• genes
  • Knowing that the crocodilian β-keratin genes are closely related to those of birds, the published genomes ofthe chicken and zebra finch provide an opportunity not only to compare the genomic organization of their β- keratins,but to study their molecular evolution in archosaurians. (sc.edu)
  • Results: The subfamilies (claw, feather, feather-like, and scale) of β-keratin genes are clustered in the same 5' to 3' orderon microchromosome 25 in chicken and zebra finch, although the number of claw and feather genes differs between the species. (sc.edu)
  • Phylogenetic analyses demonstrate that evolution of archosaurian epidermal appendagesin the lineage leading to birds was accompanied by duplication and divergence of an ancestral β-keratin gene cluster.As morphological diversification of epidermal appendages occurred and the β-keratin multigene family expanded,novel β-keratin genes were selected for novel functions within appendages such as feathers. (sc.edu)
  • The human genome encodes 54 functional keratin genes which are located in two clusters on chromosomes 12 and 17. (hitchhikersgui.de)
  • birds
  • Conclusions: Similarity in the overall genomic organization of β-keratins in Galliformes and Passeriformes suggestssimilar organization in all Neognathae birds, and perhaps in the ancestral lineages leading to modern birds, such as theparavian Anchiornis huxleyi. (sc.edu)
  • the harder β-keratins are found only in the sauropsids , that is all living reptiles and birds. (hitchhikersgui.de)
  • form
  • Fibrous keratin molecules supercoil to form a very stable, left-handed superhelical motif to multimerise, forming filaments consisting of multiple copies of the keratin monomer . (hitchhikersgui.de)
  • EP0806199A2 ] - Colourant for keratin fibres, based on vegetable dyes, is in the form of a colour suspension containing (a) pulverised vegetable dye(s), (b) oil(s) and (c) direct dye(s). (epo.org)
  • content
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