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Oxytrichidae
Oxytrichidae is a family of ciliates in the order Sporadotrichida. Oxytrichidae are morphologically diverse, ranging in length from 40 micrometres (e.g. '' Oxytricha setigera'') to 400 micrometers (e.g. '' Coniculostomum monilata''). They are generally elliptical in shape with some very flexible while others are rigid. Like other ciliates, Oxytrichidae have two or more nuclei: a large macronucleus that generally stretches across much of the cell body, and one or more smaller micronuclei Micronucleus is the name given to the small nucleus that forms whenever a chromosome or a fragment of a chromosome is not incorporated into one of the daughter nuclei during cell division. It usually is a sign of genotoxic events and chromosomal i .... References Spirotrichea Ciliate families {{Ciliate-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxytricha Trifallax
''Sterkiella histriomuscorum'', formerly ''Oxytricha trifallax'', is a ciliate species in the genus ''Sterkiella'', known for its highly fragmented genomes which have been used as a Model organism, model for ciliate genetics. Genetics Like all ciliates, ''O. trifallax'' has two different types of nuclei: Macronucleus, macronuclei, which are the site of Transcription (biology), transcription and gene expression, and Micronucleus, micronuclei, which are only active during sexual reproduction but are otherwise transcriptionally inactive. Macronuclei are formed by the differentiation of micronuclei, which usually involves some degree of RNA-mediated DNA editing. ''O. trifallax'' is the first species sequenced with an unusually high degree of fragmentation in its macronuclear genome. Up to 96% of the micronuclear genome is eliminated during the differentiation into a macronucleus; in comparison, in other ciliates like ''Paramecium'' only about 30% is eliminated. The macronuclear geno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emmanuel Fauré-Fremiet
Emmanuel Fauré-Fremiet, ForMemRS, (1883–1971) was a French biologist. Life He was the son of the composer Gabriel Fauré and Marie Fremiet, the daughter of the sculptor Emmanuel Frémiet. He was a professor at the Sorbonne, and the Collège de France. At the Institut de Biologie Physicochimique (the Rothschild Institute), he developed diffraction X-Ray, and electron microscopy with Boris Ephrussi Boris Ephrussi (russian: Борис Самойлович Эфрусси; 9 May 1901 – 2 May 1979), Professor of Genetics at the University of Paris, was a Russo- French geneticist. Boris was born on 9 May 1901 into a Jewish family. His father, .... References French biologists 1883 births 1971 deaths Foreign Members of the Royal Society Foreign associates of the National Academy of Sciences Academic staff of the University of Paris Academic staff of the Collège de France 20th-century biologists 20th-century French scientists Protistologists {{France- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |