XLT Agar Xylose Lysine Tergitol 4 Is a selective culture medium for the isolation and identification of salmonella e from food and environmental samples. It is similar to XLD agar however the agar is supplemented with the surfactant, Tergitol 4, which causes inhibition of Proteus bacterium Proteus spp. and other non Salmonellae. ref Cite pmid 7790441 ref Successful growth of Salmonella will result in growth of red colonies with a black centre. XLT Agar contains class wikitable Peptone Peptide classes Proteose Peptone 1.6g l Yeast extract 3g l L Lysine 5g l Xylose 3.75g l Lactose 7.5g l Sucrose 7.5g l Sodium chloride 5g l Sodium thiosulphate 6.8g l Ferric ammonium citrate 0.8 mg l Phenol red 0.08g l Agar 18g l See also agar plate XLD agar R2a agar MRS agar References See http en.wikipedia.org wiki Wikipedia Footnotes for a discussion of different citation methods and how to generate footnotes using the ref , ref and reference tags Reflist External links http www.foodnavigator.com news ng.asp?id 63459 salmonella Growth media DEFAULTSORT Xlt Agar Category Microbiological media microbiology stub th XLT agar ... more details
Taxobox color lightgrey name Saccharophagus degradans regnum Bacterium Bacteria phylum Proteobacteria classis Gamma Proteobacteria ordo Alteromonadales familia Alteromonadaceae genus Saccharophagus species S. degradans binomial Saccharophagus degradans binomial authority synonyms Microbulbifer degradans Saccharophagus degradans formerly Microbulbifer degradans is a bacterium which can perform the function of fermenting xylose to ethanol . In recent studies, Saccharophagus degradans from Chesapeake Bay was effectively used to produce cellulosic ethanol . Cellulosic ethanol production by means of bacterial action could be the key cheap production of cellulosic ethanol for global mass market production of bioethanol . It is currently produced by such means as gasification . S. degradans is the only species in its newly created genus. Category Alteromonadales Proteobacteria stub ... more details
Xyloglucan is a hemicellulose that occurs in the primary cell wall of all vascular plant s, however essential enzymes for xyloglucan metabolism, like XTH and 1 4 Glucan Synthase are found in Charophyceae algae. ref name Del Bem and Vincentz2010 LEV Del Bem and M Vincentz 2010 Evolution of xyloglucan related genes. BMC Evolutionary Biology , 10 340, 1 17 ref In many dicotyledon ous plants, it is the most abundant hemicellulose in the primary cell wall. ref name Fry1989 SC Fry 1989 The Structure and Functions of Xyloglucan. Journal of Experimental Biology , 40, 1 11 ref Xyloglucan binds to the surface of cellulose microfibril s and may link them together. It is the Enzyme substrate biology substrate of Xyloglucan xyloglucosyl transferase xyloglucan endotransglycosylase , which cuts and ligates xyloglucans, as a means of integrating new xyloglucans into the cell wall. It is also thought to be the substrate of alpha expansin , which promotes cell wall enlargement. Chemistry Xyloglucan has a backbone of 1 4 linked glucose residues, most of which substituted with 1 6 linked xylose sidechains. The xylose residues are often capped with a galactose residue sometimes followed by a fucose residue. The specific structure of xyloglucan varies among plant families. Biosynthesis Xyloglucan is synthesized in Golgi apparatus Golgi trans cisternae and in the trans Golgi network TGN and is transported to the cell membrane by Vesicle biology vesicles , where it is expelled and adsorbs on nascent cellulosic microfibrils. ref cite journal author Moore PJ and Staehelin LA title Immunogold localisation of the cell wall matrix polysaccharides rhamnogalacturonan I and xyloglucan during cell expansion and cytokinesis in Trifolium pratense L. Implications for sectretory pathways journal Planta year 1988 volume 174 pages 433 445 doi 10.1007 BF00634471 issue 4 ref References div class references small references div biochem stub Category Polysaccharides es Xiloglucano fr Xyloglucane ko ... more details
enzyme Name xylitol oxidase EC number 1.1.3.41 CAS number 177322 52 0 IUBMB EC number 1 1 3 41 GO code 0050582 image width caption In enzymology , a xylitol oxidase EC number 1.1.3.41 is an enzyme that catalysis catalyzes the chemical reaction xylitol O sub 2 sub math rightleftharpoons math xylose H sub 2 sub O sub 2 sub Thus, the two substrate biochemistry substrates of this enzyme are xylitol and oxygen O sub 2 sub , whereas its two product chemistry products are xylose and hydrogen peroxide H sub 2 sub O sub 2 sub . This enzyme belongs to the family of oxidoreductase s, specifically those acting on the CH OH group of donor with oxygen as acceptor. The systematic name of this enzyme class is xylitol oxygen oxidoreductase . References reflist 1 cite journal author Murooka Y date 2000 title Isolation, characterization, and molecular cloning of a thermostable xylitol oxidase from Streptomyces sp. IKD472 journal J. Biosci. Bioeng. volume 89 pages 350&ndash 60 pmid 16232758 doi 10.1016 S1389 1723 00 88958 6 last2 Omura first2 H last3 Okamoto first3 E last4 Furuya first4 Y last5 Yabuuchi first5 M last6 Fukahi first6 K last7 Murooka first7 Y issue 4 1.1 enzyme stub Category EC 1.1.3 Category Enzymes of unknown structure it Xilitolo ossidasi ja ... more details
enzyme Name xylulokinase EC number 2.7.1.17 CAS number 9030 58 4 IUBMB EC number 2 7 1 17 GO code 0004856 image width caption In enzymology , a xylulokinase EC number 2.7.1.17 is an enzyme that catalysis catalyzes the chemical reaction ATP D xylulose math rightleftharpoons math ADP D xylulose 5 phosphate Thus, the two substrate biochemistry substrates of this enzyme are adenosine triphosphate ATP and D xylulose , whereas its two product chemistry products are adenosine diphosphate ADP and D xylulose 5 phosphate . This enzyme belongs to the family of transferase s, specifically those transferring phosphorus containing groups phosphotransferase s with an alcohol group as acceptor. The systematic name of this enzyme class is ATP D xylulose 5 phosphotransferase . Other names in common use include xylulokinase phosphorylating , and D xylulokinase . This enzyme participates in pentose and glucuronate interconversions . Structural studies As of late 2007, two tertiary structure structures have been solved for this class of enzymes, with Protein Data Bank PDB accession codes PDB link 2ITM and PDB link 2NLX . References reflist 1 cite journal author Hickman J and Ashwell G date 1958 title Purification and properties of D xylulokinase in liver journal J. Biol. Chem. volume 232 pages 737&ndash 748 cite journal author Simpson FJ date 1966 title D Xylulokinase journal Methods Enzymol. volume 9 pages 454&ndash 458 cite journal author Slein MW date 1955 title Xylose isomerase from Pasteurella pestis, strain A 1122 journal J. Am. Chem. Soc. volume 77 pages 1663&ndash 1667 doi 10.1021 ja01611a074 issue 6 cite journal author Stumpf PK and Horecker BL date 1956 title The roole of xylulose 5 phosphate in xylose metabolism of Lactobacillus pentosus journal J. Biol. Chem. volume 218 pages 753&ndash 768 pmid 13295228 issue 2 enzyme stub Category EC 2.7.1 Category Enzymes of known structure ... more details
For the industrial coating Xylan coating File Xylan.svg thumb Structure Xylan CAS number 9014 63 5 is a generic term used to describe a wide variety of highly complex polysaccharides that are found in plant cell wall s and some algae . Xylans are polysaccharides made from units of xylose a pentose sugar . Xylan is found in the cell walls of some green algae , especially macroscopic macrophytic siphon siphonous genus genera , where it replaces cellulose . Similarly, it replaces the inner fibrillar cell wall layer of cellulose in some red algae . Xylan is one of the foremost anti nutritional factors in common use feedstuff raw materials. Category Polysaccharides Category Cell biology Cell biology stub de Xylane es Xilano fr Xylane id Xilan it Xilani nl Xylaan ja fi Ksylaani sv Xylan zh ... more details
Italic title Taxobox name Cryptococcus vishniacci image image caption regnum Fungi phylum Basidiomycota classis Tremellomycetes ordo Tremellales familia Tremellaceae genus Cryptococcus fungus Cryptococcus species C. vishniacci binomial Cryptococcus vishniacci binomial authority synonyms Cryptococcus vishniacci is a fungus species. It consists of 98 un described imperfect yeast isolated from soil samples in the Antarctica. While all of the isolated samples where greater than 90 similar to each other they were also less than 90 similar to other yeast species. This species grows at 4 degrees Celsius and below but not at 26 degrees Celsius and above. Visually it is characterized as a cream colored mass, lacking psedomycelia. It is nonfermentative and uses glucose, maltose, melezitose, trehalose, and xylose. ref Vishniac and Hempfling. 1979 Cryptooccus vishniacii sp. nov., an Antarctic Yeast. Int. J. Syst. Bacteriol. 29 2 153 158 ref References reflist External links wikispecies commons Category Tremellomycetes fungus stub ... more details
A pentose is a monosaccharide with five carbon atom s. ref http www.merriam webster.com dictionary pentose Pentose , Merriam Webster ref Pentoses are organized into two groups. Aldopentoses have an aldehyde functional group at position 1. Ketopentoses have a ketone functional group in position 2 or 3. Aldopentoses The aldopentoses have three chiral center s and therefore eight different stereoisomer s are possible. class wikitable align center File D arabinose.png 150px br br small D small Arabinose File D lyxose.png 150px br br small D small Lyxose File D Ribose.png 150px br br small D small Ribose File Xylose linear.png 150px br br small D small Xylose align center File arabinose.png 150px br br small L small Arabinose File lyxose.png 150px br br small L small Lyxose File L ribose.png 150px br br small L small Ribose File L xylose.png 150px br br small L small Xylose Ketopentoses The 2 ketopentoses have two chiral centers, and therefore four different stereoisomers are possible. The 3 ketopentoses are rare. class wikitable align center File Ribulose.png 150px br br small D small Ribulose File D xylulose.png 150px br br small D small Xylulose align center File L ribulose.png 150px br br small L small Ribulose File Xylulose.png 150px br br small L small Xylulose Properties The aldehyde and ketone functional groups in these carbohydrates react with neighbouring hydroxyl functional groups to form intramolecular hemiacetal s and hemiketal s, respectively. The resulting ring structure is related to furan , and is termed a furanose . The ring spontaneously opens and closes, allowing rotation to occur about the bond between the carbonyl group and the neighbouring carbon atom &mdash yielding two distinct configurations and . This process is termed mutarotation . Ribose is a constituent of RNA , and the related deoxyribose of DNA . A polymer composed of pentose sugars is called a pentosan . See also Diose Triose Tetrose Hexose Heptose Pentose phosphate pathway The anili ... more details
italic title Taxobox color lightgrey name Clostridium tyrobutyricum regnum Bacterium Bacteria divisio Firmicutes classis Clostridia ordo Clostridia le familia Clostridiaceae genus Clostridium species C. tyrobutyricum binomial Clostridium tyrobutyricum binomial authority Clostridium tyrobutyricum is a rod shape, gram positive bacteria that grows under anaerobic condition and produces butyric acid , acetic acid and hydrogen gas as their major fermentation products from glucose and xylose . The late blowing defect in cheese Clostridium tyrobutyricum spores present in raw milk ferments lactate causing the late blowing defect in high pH cheeses such as Emmentaler , Gouda or Edamer . Even low spore densities of this anaerobe in milk used for cheese production can bring about this phenomenon, if the growth conditions are suitable. This defect is characterized by eyes, slits, and cracks caused by the production of the gas bubbles as well as abnormal cheese flavor from the Butyric acid. This defect can create considerable loss of product. External links http www.lgcstandards atcc.org LGCAdvancedCatalogueSearch ProductDescription tabid 1068 Default.aspx?ATCCNum 25755&Template bacteria Clostridium tyrobutyricum ATCC 25755 Category Clostridiaceae Category Gram positive bacteria de Clostridium tyrobutyricum es Clostridium tyrobutyricum it Clostridium tyrobutyricum nl Clostridium tyrobutyricum ... more details
enzyme Name Xyloglucan 4 glucosyltransferase EC number 2.4.1.168 CAS number 80237 91 8 IUBMB EC number 2 4 1 168 GO code image width caption In enzymology , a xyloglucan 4 glucosyltransferase EC number 2.4.1.168 is an enzyme that catalysis catalyzes the chemical reaction in which a beta D glucose glucosyl residue is transferred from UDP glucose to another glucose residue in xyloglucan , linked by a beta 1,4 D glucosyl D glucose bond. This enzyme belongs to the family of glycosyltransferase s, specifically the hexosyltransferases. The systematic name of this enzyme class is UDP glucose xyloglucan 1,4 beta D glucosyltransferase . Other names in common use include uridine diphosphoglucose xyloglucan 4beta glucosyltransferase , xyloglucan 4beta D glucosyltransferase , and xyloglucan glucosyltransferase . References reflist 1 cite journal author Hayashi T, Matsuda K date 1981 title Biosynthesis of xyloglucan in suspension cultured soybean cells Occurrence and some properties of xyloglucan 4 beta D glucosyltransferase and 6 alpha D xylosyltransferase journal J. Biol. Chem. volume 256 pages 11117&ndash 22 pmid 6457048 issue 21 cite journal author Hayashi T and Matsuda K date 1981 title Biosynthesis of xyloglucan in suspension cultured soybean cells synthesis of xyloglucan from UDP glucose and UDP xylose in the cell free system journal Plant Cell Physiol. volume 22 pages 517&ndash 523 enzyme stub Category EC 2.4.1 Category Enzymes of unknown structure ... more details
chembox verifiedrevid 433898320 Name small D small Xylonic acid ImageFile xylonic acid.png ImageSize 180px IUPACName 2 R ,3 S ,4 R 2,3,4,5 tetrahydroxypentanoic acid OtherNames Lyxonic acid Xylonate Section1 Chembox Identifiers CASNo Ref cascite correct ?? CASNo 17828 56 7 CASOther small D small small L small br 526 91 0 , small D small br 4172 44 5 , small L small PubChem 6602431 SMILES C C H C H C H C O O O O O O ChemSpiderID 5034782 InChI 1 C5H10O6 c6 1 2 7 3 8 4 9 5 10 11 h2 4,6 9H,1H2, H,10,11 t2 ,3 ,4 m1 s1 InChIKey QXKAIJAYHKCRRA FLRLBIABBX StdInChI 1S C5H10O6 c6 1 2 7 3 8 4 9 5 10 11 h2 4,6 9H,1H2, H,10,11 t2 ,3 ,4 m1 s1 StdInChIKey QXKAIJAYHKCRRA FLRLBIABSA N Section2 Chembox Properties Formula C sub 5 sub H sub 10 sub O sub 6 sub MolarMass 166.13 g mol Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition Xylonic acid pronunciation z lon ik as id is a sugar acid that can be obtained by mild oxidation of xylose . References Unreferenced date July 2009 references Category Sugar acids Category Monosaccharides organic compound stub bg gl cido xil nico sr Ksilonska kiselina ... more details
chembox verifiedrevid 318112231 name Sambubiose ImageFile Sambubiose.svg ImageSize 320px IUPACName OtherNames Section1 Chembox Identifiers CASNo 26388 68 1 CASOther PubChem SMILES Section2 Chembox Properties Formula C sub 11 sub H sub 20 sub O sub 10 sub MolarMass 312.27 g mol ExactMass 312.105646 Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition Sambubiose is a disaccharide . It is the D xylose xylosyl 1 2 D glucose . Sambubiosides with anthocyanidins can be found in Matthiola incana . ref http www.sciencedirect.com science? ob ArticleURL& udi B6TH7 3YRS9KM 4F& user 10& coverDate 03 2F31 2F1995& alid 1006871627& rdoc 6& fmt high& orig search& cdi 5275& docanchor &view c& ct 9& acct C000050221& version 1& urlVersion 0& userid 10&md5 a362d6ee2f0f3a1b2e2634fea1d9ea2a Acylated cyanidin 3 sambubioside 5 glucosides in Matthiola incana, Norio Saito, Fumi Tatsuzawa, Akiko Nishiyama, Masato Yokoi, Atsushi Shigihara and Toshio Honda, 1994 ref References reflist External links http www.seekchemicals.com productshow.asp?keyword 26388 68 1 Sambubiose on seekchemicals.com Category Disaccharides chemistry stub fa ... more details
Taxobox image image alt image caption regnum Fungi phylum Ascomycota classis Saccharomycetes ordo Saccharomycetales familia Saccharomycetaceae genus Pachysolen species P. tannophilus binomial Pachysolen tannophilus binomial authority Boidin & Adzet 1957 synonyms ref ref name urlMycoBank Pachysolen tannophilus synonyms Pachysolen pelliculatus small Boidin & Adzet 1957 small br Hansenula tannophila small Boidin & Azet Campbell 1973 small Pachysolen is a genus of yeast discovered from sulfite liquor by Boidin and Adzet 1957 and isolated by Wickerham 1970 . ref Wickerham, L. J. 1970. Genus 14. Pachysolen Boidin et Adzet, pp. 448 454. In J. Lodder ed. , The Yeasts. A taxonomic study, 2nd ed. North Holland Publishing Co., Amsterdam ref The genus is monotypic , containing the single species Pachysolen tannophilus , the first yeast identified to have a high capacity for production of ethanol from xylose . References Reflist refs ref name urlMycoBank Pachysolen tannophilus cite web url http www.mycobank.org MycoTaxo.aspx?Link T&Rec 302177 title Pachysolen tannophilus Boidin & Adzet 1957 publisher International Mycological Association work MycoBank accessdate 2011 01 29 ref External links IndexFungorum 3676 Category Fungi described in 1957 Category Monotypic Ascomycota genera Category Yeasts yeast stub ... more details
Capsulan is the exopolysaccharide which makes up the thick capsule surrounding the unicellular alga Prasinococcus capsulatus . ref name Sie Sieburth et al. 1999 Widespread occurrence of the oceanic ultraplankter Prasinococcus capsulatus Prasinophyceae , the diagnostic Golgi Decapore complex and the newly discovered polysaccharide capsulan ref Extraction Capsulan is extrated from cell cultures of P. capsulatus using the French Press method to burst the cells. Alternatively the cells may be boiled. ref name Kur Kurano, 1995, Fixation and Utilization of Carbon Dioxide by Microalgal Photosynthesis ref Composition Capsulan has been found to be mostly carbohydrate 70 with some protein and sulphur . The main sugars making up the carbohydrate are galactose and glucose while other sugars such as xylose , arabinose and mannose are also present in smaller quantities. ref name mykle Myklestad, 1999, Phytoplankton extracellular production and leakage with considerations on the polysaccharide accumulation ref Sugar acids are common in plant and algal polysacchride but there is disagreement in the literature concerning capsulan s sugar acid content. Kurano ref name Kur ref claims that capsulan contains none, while Myklestad ref name mykle ref maintains that both galacturonic and glucuronic acids are present. Notes reflist Category Polysaccharides ... more details
Italic title Taxobox name Cryptococcus ater image image caption regnum Fungi phylum Basidiomycota classis Tremellomycetes ordo Tremellales familia Tremellaceae genus Cryptococcus fungus Cryptococcus species C. ater binomial Cryptococcus ater binomial authority synonyms Cryptococcus ater is a species of Cryptococcus that has some unique characteristics. When grown on agar it typically produces cream colonies, however when grown on neopeptone agar slants, the colonies turn olive green after approximately four weeks. This species also turns nearly black when grown on Diamalt agar slants and on Gorodkova agar after approximately three months. When grown in liquid media it develops sediment and a weak ring. On the microscopic level the cells appear globose to ovate and are capsulated. Occasionally the cells have been seen to create chains of four to five cells. When grown, it does not require vitamins, but its growth is weakened by the presence of ammonium sulfate. It is able to assimilate alpha methyl D glucoside, Ca 2 keto gluconate, cellobiose, D arabinose, D mannitol, D sorbitol, D xylose, galactose, glucose, K 5 keto gluconate K gluconate, lactose, L arabinose, L rhamnose, maltose, melezitose, i inositol, raffinose, salicin and trehalose. This species has been isolated from ulcers in a leg. ref Cook. B. 1965 A note on cryptococcus after castellani. U.S. Dept. of Health. ref References reflist External links wikispecies commons Category Tremellomycetes fungus stub ... more details
Italic title Taxobox name Cryptococcus curvatus image image caption regnum Fungi phylum Basidiomycota classis Tremellomycetes ordo Tremellales familia Tremellaceae genus Cryptococcus fungus Cryptococcus species C. curvatus binomial Cryptococcus curvatus binomial authority synonyms Cryptococcus curvatus is a fungus species. It is an extremophile found in cold seep sites. It is oleaginous, and uses the sugars in cellulose for the growth and production of storage triglycerides. Takishita et al. 2010 Molecular evidence that phylogenetically diverged ciliates are active in microbial mats of deep sea cold seep sediment. 57 1 76 86 ref This species has been extensively studied in relation ship to lipids. It can uptake both glucose and xylose simultaneously. When grown in old oil with high levels of polymerized triglyceride, the cell wall transforms from being smooth to having hair or wart like protuberances which are believed to assist in lipid uptake. ref Leeuw et al. 2010 The effects of palm oil breakdown products on lipid turnover and morphology of fungi. Can. J. Microbiol. 56 883 889 ref References reflist External links wikispecies commons Category Tremellomycetes fungus stub ... more details
A hemicellulose is any of several heteropolymer s matrix polysaccharides , such as arabinoxylan s, present along with cellulose in almost all plant cell wall s. While cellulose is crystalline, strong, and resistant to hydrolysis , hemicellulose has a random, amorphous structure with little strength. It is easily hydrolyzed by dilute acid or Base chemistry base as well as myriad Cellulase hemicellulase enzymes. Composition Hemicelluloses include xylan , glucuronoxylan, arabinoxylan , glucomannan , and xyloglucan . These polysaccharides contain many different sugar monomers. In contrast, cellulose contains only anhydrous glucose. For instance, besides glucose, sugar monomers in hemicellulose can include xylose , mannose , galactose , rhamnose , and arabinose . Hemicelluloses contain most of the D pentose sugars, and occasionally small amounts of L sugars as well. Xylose is always the sugar monomer present in the largest amount, but mannose mannuronic acid and galacturonic acid also tend to be present. Structural comparison to cellulose Unlike cellulose, hemicellulose also a polysaccharide consists of shorter chains 500 3,000 sugar units as opposed to 7,000 15,000 glucose molecules per polymer seen in cellulose. In addition, hemicellulose is a branched polymer , while cellulose is unbranched. Native structure File Plant cell wall diagram.svg thumb Section of a cell wall hemicellulose in green Hemicelluloses are embedded in the cell walls of plants, sometimes in chains that form a Matrix biology ground they bind with pectin to cellulose to form a network of cross linked fibres. Biosynthesis Hemicelluloses are synthesised from sugar nucleotides in the Golgi. Two models explain their synthesis 1 a 2 component model where modification occurs at two transmembrane proteins, and 2 a 1 component model where modification occurs only at one transmembrane protein. After synthesis, hemicelluloses are transported to the plasma membrane via golgi vesicles. Applications As percent co ... more details
Xethanol AMEX XNL was one of the smaller producers of corn ethanol in the United States, and one of the few publicly traded companies developing technology for producing cellulose ethanol . Ethanol fuel will have increased production from a current level of about convert 5 e9USgal m3 per year 19 Gl a, almost exclusively from corn to over convert 20 e9USgal m3 annually 76 Gl a, mainly from cellulosic materials . Potentially convert 60 to 100 e9USgal of ethanol could be produced annually in a sustainable manner from domestic biomass resources. To achieve these goals some believe it will be necessary to develop and commercialize technology for the production of ethanol from cellulose and hemicellulose . Xethanol says it plans to increase production and profitability with new technology it has under development. Xylose Technologies, Inc. XTI , a subsidiary of Xethanol, is conducting collaborative research through a Cooperative Research and Development Agreement CRADA with the USDA Forest Service , Forest Products Laboratory FPL located on the campus of the University of Wisconsin Madison . The work focuses on genetically engineering proprietary yeast strains for the efficient production of xylitol from xylose . Xylose, an abundant five carbon sugar found predominantly in hemicellulose of angiosperms, can be converted to xylitol through biochemical or chemical reduction . The USDA and other university research labs have hundreds of such CRADAs with many companies exploring the technology. History Xethanol was formed as a Delaware corporation in 2000 through a reverse merger with Zen Pottery Equipment . It is based in New York and has operated two production facilities in Iowa since 2003. It began with the acquisition of Permeate Refining, Inc. , and in 2004, Xethanol purchased a second plant which operates as Xethanol Biofuels, LLC . In early 2005 it acquired Superior Separation Technologies, Inc. from UTEK Corporation. It has announced plans to build new ethan ... more details
The large and complex glycans that modify proteoglycans are initiated by addition of xylose to serine. This is the only form of glycan so far reported to begin with xylose addition directly to protein apart from the xylose seen on phospho serine in Dictyostelium discoideum described below ... more details
chembox verifiedrevid 450937939 Name small D small Ribulose ImageFileL1 D Ribulose.svg ImageSizeL1 88px ImageFileR1 Ribulose.svg ImageSizeR1 150px IUPACName 3R,4R 1,3,4,5 Tetrahydroxypentan 2 one OtherNames small D small erythro 2 Pentulose br Adonose br Arabinulose br Araboketose br Ribosone Section1 Chembox Identifiers CASNo 488 84 6 CASOther D br 2042027 5 L br 5556 48 9 DL PubChem 151261 SMILES D C C H C H C O CO O O O br L OCC C H O C H O CO O Section2 Chembox Properties C 5 H 10 O 5 Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition Ribulose is a ketopentose &mdash a monosaccharide containing five carbon atom s, and including a ketone functional group . It has chemical formula carbon sub 5 sub hydrogen sub 10 sub oxygen sub 5 sub . Two enantiomers are possible, small D small ribulose small D small erythro pentulose and small L small ribulose small L small erythro pentulose . small D small Ribulose is the diastereomer of small D small xylulose . Ribulose sugars are composed in the pentose phosphate pathway . They are important in the formation of many bioactive substances. For example, small D small ribulose is an intermediate in the fungal pathway for small D small arabitol production. Also, as the 1,5 bisphosphate, small D small ribulose combines with carbon dioxide at the start of the photosynthesis process in green plants carbon dioxide trap . A synthetic form of ribulose known as sucroribulose is found in many brands of artificial sweeteners. See also Arabinose Deoxyribose Lyxose Ribose Xylose Xylulose Carbohydrates Category Ketopentoses bg ca Ribulosa de Ribulose es Ribulosa fa fr Ribulose gl Ribulosa it Ribulosio hu Ribul z ja pl Rybuloza pt Ribulose ru sr sh Ribuloza tr Ribuloz zh ... more details
Refimprove date July 2010 Invertase EC number 3.2.1.26 systematic name beta fructofuranosidase is an enzyme that catalyst catalyzes the hydrolysis breakdown of sucrose table sugar . The resulting mixture of fructose and glucose is called inverted sugar syrup . Related to invertases are sucrases. Invertases and sucrase s hydrolyze sucrose to give the same mixture of glucose and fructose. Invertases cleave the O C fructose bond, whereas the sucrases cleave the O C glucose bond. ref name Ullmann Hubert Schiweck, Margaret Clarke, G nter Pollach Sugar in Ullmann s Encyclopedia of Industrial Chemistry 2007, Wiley VCH, Weinheim. DOI 10.1002 14356007.a25 345.pub2 ref For industrial use, invertase is usually derived from yeast . It is also synthesized by bees, who use it to make honey from nectar. Optimum temperature at which the rate of reaction is at its greatest is 60 C and an optimum pH of 4.5. ref name Ullmann Typically, sugar is inverted with sulfuric acid. Applications and examples Refimprove date April 2012 Verify sources date April 2012 Invertase is expensive, so it may be preferable to make fructose from glucose using Xylose isomerase glucose isomerase instead. Chocolate covered cherries, and Caramilk bars include invertase, ref The Periodic Table of Videos, Valentines Day video, http www.periodicvideos.com ref which liquifies the sugar inside. Once the candy is manufactured, it needs at least a couple of days to a couple of weeks in storage so that the invertase can do its work. See also List of enzymes References references External links MeshName Invertase Glycoside hydrolases Category EC 3.2.1 cs Invert za de Invertase fr Invertase io Invertazo it Invertasi he ja pl Inwertaza pt Invertase ru zh ... more details
chembox Verifiedfields changed verifiedrevid 400114624 ImageFile Lyxose.png ImageSize 180px ImageFile1 Alpha D Lyxopyranose.svg ImageSize1 150px IUPACName 2R,3R,4S 2,3,4,5 Tetrahydroxypentanal OtherNames L Lyxose br Lyxopyranose Section1 Chembox Identifiers CASNo Ref cascite correct ?? CASNo 1949 78 6 PubChem 65550 ChEMBL Ref ebicite changed EBI ChEMBL 1159661 SMILES C C H C H C H C O O O O O Section2 Chembox Properties Formula C sub 5 sub H sub 10 sub O sub 5 sub MolarMass 150.13 Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition Lyxose is an aldopentose &mdash a monosaccharide containing five carbon atom s, and including an aldehyde functional group . It has chemical formula carbon sub 5 sub hydrogen sub 10 sub oxygen sub 5 sub . Lyxose occurs only rarely in nature, for example, as a component of bacterial glycolipid s. ref name ACS Kay Hooi Khoo et al. , Chemistry of the Lyxose Containing Mycobacteriophage Receptors of Mycobacterium phlei Mycobacterium smegmatis, Biochemistry , 35 36 , 11812 11819, 1996. http pubs.acs.org cgi bin abstract.cgi bichaw 1996 35 i36 abs bi961055 .html Abstract ref See also Arabinose Deoxyribose Ribose Ribulose Xylose Xylulose References Reflist External links http biocyc.org ECOLI NEW IMAGE?type PATHWAY&object LYXMET PWY E. coli K 12 Pathway L lyxose degradation Carbohydrates Category Aldopentoses bg ca Lixosa de Lyxose es Lixosa fr Lyxose fy Lyksoaze gl Lixosa ja pl Liksoza pt Lixose tr Liksoz zh ru ... more details
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