Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q2930097> ?p ?o }
Showing triples 1 to 26 of
26
with 100 triples per page.
- Q2930097 subject Q8572917.
- Q2930097 abstract "β-keratin or beta-keratin is a protein in the keratin family. β-keratin is rich in stacked β pleated sheets, in contrast to alpha-keratin, a fibrous protein rich in alpha helices.β-keratin is found in reptiles. It adds much more rigidity to reptilian skin than alpha-keratin does to mammalian skin.β-keratin is impregnated into the stratum corneum of the reptilian skin, providing waterproofing and the prevention of desiccation.In birds, scales, beaks, claws and feathers also contain β-keratin of the avian family. Phylogenetic studies of β-keratin sequences show that feather β-keratins evolved from scale β-keratins. The scale β-keratins form the basal group in avians. Duplication and divergence events then led to claw β-keratin genes, and further recombination resulted in new feather and feather-like avian β-keratin genes. Evidence for these duplication events comes from the correlation of feather β-keratin clade structure with their genomic loci.Changes in β-keratins may have also influenced the development of powered flight. A recent study using molecular dating methods to link the evolution of β-keratin genes to that of feathers reveals that the avian β-keratin family began diverging from the crocodile family about 216 million years ago. But the feather β-keratin family did not begin diverging until 125 million years ago, a date consistent with the adaptive radiation of birds during the Cretaceous. β-keratins found in modern feathers have increased elasticity, a factor that may have contributed to their role in flight. Thus, the feathered ancestors of birds including Anchiornis and Archaeopteryx, whose flight capabilities have been questioned, would have had avian, but not feather β-keratins.The small alvarezsaurid dinosaur Shuvuuia deserti showed evidence of a featherlike skin covering. Analysis by Schweitzer et al. (1999) showed that these featherlike structures consisted of beta-keratin.".
- Q2930097 wikiPageWikiLink Q100196.
- Q2930097 wikiPageWikiLink Q10811.
- Q2930097 wikiPageWikiLink Q131235.
- Q2930097 wikiPageWikiLink Q134179.
- Q2930097 wikiPageWikiLink Q134230.
- Q2930097 wikiPageWikiLink Q188488.
- Q2930097 wikiPageWikiLink Q189474.
- Q2930097 wikiPageWikiLink Q2038676.
- Q2930097 wikiPageWikiLink Q217605.
- Q2930097 wikiPageWikiLink Q2326110.
- Q2930097 wikiPageWikiLink Q283399.
- Q2930097 wikiPageWikiLink Q283449.
- Q2930097 wikiPageWikiLink Q31528.
- Q2930097 wikiPageWikiLink Q430.
- Q2930097 wikiPageWikiLink Q7377.
- Q2930097 wikiPageWikiLink Q8054.
- Q2930097 wikiPageWikiLink Q81025.
- Q2930097 wikiPageWikiLink Q828371.
- Q2930097 wikiPageWikiLink Q8572917.
- Q2930097 wikiPageWikiLink Q903071.
- Q2930097 type Thing.
- Q2930097 comment "β-keratin or beta-keratin is a protein in the keratin family. β-keratin is rich in stacked β pleated sheets, in contrast to alpha-keratin, a fibrous protein rich in alpha helices.β-keratin is found in reptiles.".
- Q2930097 label "Beta-keratin".
- Q2930097 differentFrom Q306135.