Infobox Anatomy Name Organelle Latin organella GraySubject GrayPage Image biological cell.svg Caption ... MeshName MeshNumber Code TerminologiaHistologica 1 00 01.0.00009 In cell biology , an organelle IPAc ..., and is usually separately enclosed within its own lipid bilayer . The name organelle comes from ... organelle, the suffix elle being a diminutive . Organelles are identified by microscopy , and can ... organula is appropriate. Cited after Oxford English Dictionary online, entry for organelle .... It would take several years before organulum , or the later term organelle , became accepted and expanded ... Organellen findet wenigstens bei h heren Pflanzen nicht statt ref Around 1920, the term organelle was used to describe propulsion structures motor organelle complex , i.e., flagella and their anchoring ... he stated that, for Vahlkampfia s, the alternative organelle or product of structural build up had ... definition of organelle emerged, after which only cellular structures with surrounding Biological membrane ... organelle should refer only to structures that convert energy, such as centrosomes, ribosomes ... Gegenbaurs morphologisches Jahrbuch ref ref Albert Frey Wyssling Concerning the concept Organelle ... wide recognition. Examples While most cell biologists consider the term organelle to be synonymous with cell compartment , other cell biologists choose to limit the term organelle to include only those ... 2008 08 07 year 2008 month April author Keeling, Pj Archibald, Jm title Organelle evolution what ... authorlink Christopher Mullins title The Biogenesis of Cellular Organelles chapter Theory of Organelle ... as organelles. Nevertheless, the use of organelle to refer to non membrane bound structures ... Organelle Main function Structure Organisms Notes chloroplast plastid photosynthesis , traps ... organelles and cell components Organelle Macromolecule Main function Structure Organisms acrosome ... Organelle Macromolecule Main function Structure Organisms carboxysome carbon fixation protein shell ... more details
Organelle biogenesis is the biogenesis , or creation, of organelle cellular organelles in Cell biology cells . Organelle biogenesis includes the process by which cellular organelles are split between daughter cells during mitosis this process is called organelle inheritance. ref name Mullins cite book last Mullins first Christopher title The Biogenesis of Cellular Organelles chapter Theory of Organelle Biogenesis A Historical Perspective year 2004 publisher Springer Science Business Media , National Institutes of Health isbn 0306479907 ref Discovery Following the discovery of cellular organelles in the nineteenth century, little was known about their function and synthesis until the development of electron microscopy and subcellular fractionation in the twentieth century. This allowed experiments on the function, structure, and biogenesis of these organelles to commence. Mechanisms of protein sorting and retrieval have been found to give organelles their characteristic composition. It is known ... processes are known to have developed for organelle biogenesis. These can range from de novo synthesis to the copying of a template organelle the formation of an organelle from scratch and using a preexisting organelle as a template to manufacture an organelle, respectively. The distinct structures of each organelle are thought to be caused by the different mechanisms of the processes which create ... during the process of cellular division known as organelle inheritance , where the organelle of the parent ... journal v8 n6 full nrm2179.html pmid 17505521 ref The process of organelle biogenesis is known to be regulated ... for specific organellar proteins. In order for organelle biogenesis to be carried out properly, the specific ... to their respective sites of subcellular function, a defective organelle that fails to fulfill its ... title Molecular Mechanisms of Organelle Biogenesis and Related Metabolic Diseases journal Med Princ ... are known to be caused by a fault in the process of organelle biogenesis. These may include mitochondrial ... more details
Unsourced date February 2012 Image Polar Membrane cut.png right thumb Sketch of a longitudinal ultrathin section through a typical motile bacterium bearing a flagellum and surrounding polar organelle at one end of the cell. Polar organelle also referred to in some microbiological literature articles as polar membrane or polar cap is a specialized region of the lipid cell membrane in bacteria l cells, usually located at or near the so called Cell biology pole s e.g. the ends of a cylindrical cell . This region can easily be distinguished from the normal membrane regions in ultrathin sections of embedded bacteria by electron microscopy when the cell membrane is orientated perpendicular to the viewing direction. There, the membrane appears slightly thickened with a finely frilled layer facing the inside of the cell. It is also possible to isolate these polar organelles from the bacterial cells and study them in face view in negative stain negatively stained preparations. The polar organelle bears a fine array of attached particles in hexagonal close packing and these have been shown to possess ATPase activity. Interestingly, the polar organelle is invariably found in close juxtaposition to the points of insertion of the bacterial flagella into the plasma membrane, especially where multiple flagella bases are grouped in a region of the cell membrane. It may thus be inferred that the polar organelle could be of importance in the supply and transfer of energy to the bidirectional molecular rotational motor situated at the base of each individual bacterial flagellum see also Electrochemical gradient . References DEFAULTSORT Polar Organelle Anatomy stub Category Cell anatomy ... more details
like vault organelle. They also contain small vault RNA s vRNAs of 86 141 bases within. ref cite ... Vault Organelle Category Organelles it Vault ja zh ... more details
Orphan date February 2009 A vesiculo vacuolar organelle is an organelle found in the cytoplasm of endothelial cells that line both tumor and normal blood vessel s. They help active transport actively transport fluid and cells across endothelial cells, contributing to the increase in vascular permeability that occurs during the process of inflammation . This kind of transport is mediated by Vascular endothelial growth factor VEGF , one of the chemical mediators of inflammation . Category Organelles Category Angiology circulatory stub ... more details
Orphan date December 2009 Localization of organelle proteins by isotope method tagging or LOPIT is a method for determining the subcellular localization of membrane protein s. see Dunkley et al. 2006 Proc. Natl. Acad. Sci 103 17 p 6518 DEFAULTSORT Localization Of Organelle Proteins By Isotope Method Tagging Category Research methods Biology stub ... more details
Midbody may refer to The middle part of the body of an animal in zoology . Midbody cell biology , a transient organelle formed after mammalian cell division . disambig ... more details
about the Plasmodium intracellular organelle other organelles known as food vacuole Vacuole The food vacuole , or digestive vacuole , is an organelle found in parasites that cause malaria . During the stage of the parasites lifecycle where it resides within a human or other mammalian red blood cell, it is the site of haemoglobin digestion and the formation of the large haemozoin crystals that can be seen under a light microscope . ref pmid 11782538 ref References Reflist Category Malaria ... more details
Cell structure may refer to An organelle , or the layout of organelles of the biological cell itself The structure of a covert cell , often involved in underground resistance, organised crime, terrorism or any group requiring stealth in its operations In mathematics, the structure of a cell complex disambig ... more details
Unreferenced stub auto yes date December 2009 Micronemes are cellular organs, or organelles , possessed by Apicomplexa protozoans that are restricted to the apical third of the protozoan body. They are surrounded by a typical unit membrane. On electron microscopy they have an electron dense matrix due to the high protein content. They are specialized secretory organelles important for gliding motility and host cell invasion. These organelles secrete several proteins such as Plasmodium falciparum apical membrane antigen 1 apical membrane antigen 1 , or PfAMA1, and Erythrocyte family antigen, or EBA, family proteins. These proteins specialize in binding to erythrocyte surface receptors and facilitating erythrocyte entry. Only by this initial chemical exchange can the parasite enter into the erythrocyte via actin myosin motor complex. This is a crucial organelle for the P. falciparum parasite. It has been posited that this organelle works cooperatively with its counterpart organelle, the rhoptry, which also is a secretory organelle. It is possible that, while the microneme initiates erythrocyte binding, the rhoptry secretes proteins to create the PVM, or the parasitophorous vacuolar membrane, in which the parasite can survive and reproduce. See also Dense granule Protist Category Parasitology Med stub ... more details
The Stieda body is an organelle located at the polar region of the Apicomplexa lifecycle stages sporocyst of some coccidia visible with electron microscopy. It appears as a knob like structure and is a plug occluding a hole in the sporocyst. The breakdown of this body allows excystation of the sporozoite s. Alveolata Chromalveolate diseases Category Parasites Category Apicomplexa ... more details
Orphan date February 2009 A Berkeley Body is an organelle unique to the yeast cell Saccharomyces cerevisiae , with a secretory mutation in the genes ARFGEF2 sec7 and SEC14L5 sec14 . The function of the organelle lies in the CTV cytoplasm to vacuole targeting Pathway, which is a transport pathway for certain vacuolar hydrolases to be degenerated. The Berkeley Body acts as the transport medium from the cytoplasm to the vacuole within this pathway. Studies have shown that Berkeley Bodies share stuctural similarites with autophagosomes, which are involved in autophagy ref Fulvio Reggiori, Chao Wen Wang, Usha Nair, Takahiro Shintani, Hagai Abeliovich, and Daniel J. Klionsky, Early Stages of the Secretory Pathway, but Not Endosomes, Are Required for Cvt Vesicle and Autophagosome Assembly in Saccharomyces cerevisiae , from Molecular Biology of the Cell Vol. 15, 2189 2204, May 2004. ref The organelle consists of two enclosed membranes forming an enclosed lumen, which contains cytoplasm. It is formed by vesicles budding off the Golgi Apparatus or the Endoplasmic Reticulum . They were discovered in 1980 by Novick and Schekman. ref Peter Novick, Charles Field and Randy Schekman. Identification of 23 Complementation Groupsm, Required for Post translational Events in the Yeast Secretory Pathway. Cell , Vol. 21, 205 215, August, 1980. ref References references Category Organelles biology stub ... more details
Pili may refer to Common names Pilus plural pili is a cellular organelle Pili, a Philippine Tree that is a source of the Pili nut Pili grass is a Hawaiian grass used to thatch structures Proper names Pili kaaiea is a Hawaiian chief, a founder of the Ulu line Pili, Camarines Sur is a municipality in the Philippines Pili, barangay in Danao City Pili TV series is a puppet show from Taiwan disambig de Pili fr Pili homonymie it Pili fi Pili t smennyssivu ... more details
A trichocyst is an organelle found in certain ciliate ciliates ref pmid 7579685 ref ref pmid 20285925 ref and dinoflagellate dinoflagellates . ref pmid 22209083 ref A trichocyst can be found in tetrahymena and along cila pathways of several metabolic systems. External links http media 2.web.britannica.com eb media 68 8968 004 A94DB3DF.jpg Picture of a Trichocyst References references Category Cell biology Category Protista Microbiology stub de Trichozyste io Trikocisto it Tricociste pl Trichocysty ... more details
Multiple issues wikify March 2012 unreferenced November 2006 orphan November 2009 In the scientific literature polar membrane has acquired two separate meanings. 1 A lipid biomembrane expressing polarity in the electrical sense. Such membranes can be manipulated chemically and their electrical properties can be studied by application of biophysical techniques. 2 A synonym for the bacteriological term Polar organelle . DEFAULTSORT Polar Membrane Category Membrane biology ... more details
Eyespot can mean Eyespot mimicry , a color mark that looks somewhat like an eye Eyespot flatworm , a Sensory system sensory organ in flatworms Eyespot, a type of eye in some gastropods, a part of sensory organs of gastropods Eyespot apparatus , a photoreceptive organelle found in the flagellate motile cells unicellular photosynthetic organisms In diseases Eyespot wheat , a disease of wheat. Groundnut eyespot virus , a plant pathogenic virus Fish species Eyespot gourami Parasphaerichthys ocellatus Eyespot puffer Tetraodon biocellatus Eyespot skate Atlantoraja cyclophora disambig ... more details
A Nuclear gene is a gene located in the cell nucleus of a eukaryote . The term is used to distinguish nuclear gene s from the gene s in the mitochondrion , and in case of plants, also the chloroplast , which host their own genetic system and can produce proteins from scratch. The term gene most often refers to nuclear genes. The distinct genome s of eukaryotes are thought to have arisen through symbiosis symbiotic relationships. The mitochondrion represents a eubacterium that integrated into its archaea l host cell biology cell s physiology to such an extent that it became an integral cell component, or organelle . ref http www.ijdb.ehu.es web paper.php?doi 10.1387 ijdb.051997el Enrique Lopez Juez and Kevin A. Pyke Plastids unleashed their development and their integration in plant development Int. J. Dev. Biol. 49 557 577 2005 Free full text ref ref http www.ncbi.nlm.nih.gov entrez query.fcgi?db pubmed&cmd Retrieve&dopt AbstractPlus&list uids 12871231&query hl 5&itool pubmed DocSum Hoffmeister M, Martin W Interspecific evolution microbial symbiosis, endosymbiosis and gene transfer. Environ Microbiol. 2003 Aug 5 8 641 9. ref The process repeated in plants, with a cyanobacteria l symbiont in a eukaryote host becoming the chloroplast. The nuclear genes represent the genome of the original host cell, while both of these organelle s still retain a small genome , although many of the genes of the organelles have moved to the nucleus during the course of evolution. The majority of the protein s of a cell are the product of messenger RNA Transcription genetics transcribed from nuclear genes, including most of the proteins of the organelles, which are produced in the cytoplasm like all nuclear gene products and then transported to the organelle. In addition, there are nuclear genes that encode non Translation biology translated regulatory RNA s. Genes in the nucleus are arranged in a linear fashion upon chromosomes , which serve as the scaffold for replication and the regul ... more details
Unreferenced date October 2006 Image Diagram of a human mitochondrion.png thumb 300px right Diagram of a human mitochondrion In genetics , a cytohet or heteroplasmon is a eukaryotic Cell biology cell whose cell nucleus non nucleic genome is heterozygous . The non nucleic genome of eukaryotic cells exists in cytoplasm ic organelle s, namely the chloroplast s only in plant cell s and the mitochondria in all eukaryotic cells . Most of the gene s in the mitochondria code for cellular respiration respiration related protein s, and most of the genes in the chloroplasts code for photosynthesis related proteins. The cytoplasmic genome, in contrast with the nucleic genome, exists in many copies in each cell each cell contains numerous mitochondria and or chloroplasts, and each such organelle contains multiple copies of its chromosome . Mutation s in the cytoplasmic genome occur spontanteously and at a much higher rate than in the nucleus, since the mitochondria and chloroplasts are exposed to high concentration s of reactive oxygen species ROS, by products of respiration and photosynthesis . Mitochondria and chloroplasts with mutant genes have the ability to cause wildtype allele s in other mitochondria and chloroplasts to become mutant as well the way in which this is done is still not clear. A certain cell in which a mutant gene exists only in some of the organelles, whereas the wildtype allele exists in the rest, is a cytohet or heteroplasmon . Category Mitochondrial genetics ... more details
Wiktionary apparatus Apparatus may refer to Technical term for body of the Soviet and post Soviet governments see Apparatchik Machine Equipment Critical apparatus , the critical and primary source material that accompanies an edition of a text See also Fire apparatus Gymnastics Kipp s apparatus , an apparatus designed for preparation of small volumes of gases Golgi apparatus , an organelle found in most eukaryotic cells Apparatus theory The Red Jumpsuit Apparatus , a post hardcore band Ideological state apparatuses, a Louis Althusser Ideological state apparatuses philosophical construct by Louis Althusser disambig ca Aparell de Apparat eu Aparatu argipena fr Appareil ia Apparato disambiguation it Apparato pl Aparat ru uk ... more details
Unreferenced stub auto yes date December 2009 Image Plastids types en.svg right thumb 220px The differentiation of Elaioplasts Elaioplasts are a type of leucoplast that is specialized for the storage of lipids in plants. Elaioplasts house oil body deposits as rounded plastoglobuli, which are essentially fat droplets. Being a variety of leucoplast, elaioplasts are non pigmented and fall into the much broader organelle category of plant plastid s. A different example of a storage specialized leucoplast is the amyloplast . Compare Plastid Chloroplast and etioplast Chromoplast Leucoplast Amyloplast Proteinoplast Category Plant cells Cell biology stub de lk rper es Oleoplasto fr Ol oplaste gl Elaioplasto it Elaioplasto nl Elaioplast pl Elajoplast zh ... more details
Golgi may refer to Camillo Golgi 1843 1926 , Italian physician and scientist after which the following terms are named Golgi apparatus also called the Golgi body, Golgi complex, or dictyosome , an organelle in the eukaryotic cell Golgi tendon organ , a proprioceptive sensory receptor organ Golgi s method or Golgi stain, a nervous tissue staining technique Golgi alpha mannosidase II , an enzyme Golgi cell , a type of interneuron found in the cerebellum Golgi I , a nerve cell with a long axon Golgi II , a nerve cell with a short or no axon Golgi crater , a lunar impact crater C rteno Golgi , an Italian village disambig ca Golgi desambiguaci de Golgi it Golgi zh simple Golgi ... more details
Infobox Anatomy Name Synaptosome Latin synaptosoma GraySubject GrayPage Image Caption Image2 Caption2 Precursor System Artery Vein Nerve Lymph MeshName Synaptosomes MeshNumber Code TerminologiaHistologica 2 00 06.2.00033 A synaptosome is an isolated synaptic terminal from a neuron . Synaptosomes are obtained after Homogenization biology homogenization and fractionation of nervous tissue. The fractionation step involves several rounds of centrifugation to separate various organelle s from the synaptosomes. Synaptosomes are formed from the phospholipid layer of the cell membrane and synaptic protein s such as Receptor biochemistry receptors . Synaptosomes are commonly used to study synaptic transmission because they contain the molecular machinery necessary for the uptake, storage, and release of neurotransmitters and because they are relatively easy to prepare in the laboratory. Category Neurology Cell biology stub pl Synaptosom ... more details
GER or Ger may refer to Great Eastern Railway , a British railway company formed in 1862 The list of IOC country codes Olympic and List of FIFA country codes FIFA country code for GER Great Eastern Run , a running event in Peterborough , United Kingdom endoplasmic reticulum Granular endoplasmic reticulum , a cell organelle Gross enrolment ratio , a statistical measure used in the education sector and by the UN Gastroesophageal reflux, a less severe form of gastroesophageal reflux disease Gap Excess Ratio , a statistical measure in evolutionary biology for the congruence of tree topology with stratigraphic occurrence Rafael Cabrera Airport IATA code GER disambig it GER lv GER ja GER ... more details
Photoreceptor can refer to In anatomy cell biology Photoreceptor cell a photosensitive cell in the retina of vertebrate eyes Simple eyes in arthropods Ocellus , photoreceptor organ simple eye of invertebrates often composed of a few sensory cells and a single lens Eyespot apparatus microbial photoreceptor the photoreceptor organelle of a unicellular organism that allows for phototaxis In biochemistry Photoreceptor protein a chromoprotein that responds to being exposed to a certain wavelength of light by initiating a signal transduction cascade Photopigment an unstable pigment that undergoes a physical or chemical change upon absorbing a particular wavelength of light also see Photosynthetic pigment molecules involved in transducing light into chemical energy In technology Photodetector or photosensor a device that detects light by capturing photons Electronic Photoreceptor Sensor that converts solar energy into electric energy disamb cs Fotoreceptor de Fotorezeptor fr Photor cepteur ... more details
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