46 citations
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November 1998 in “Experimental Cell Research” K15 gene is mainly active in the basal layers of hair follicles and epithelia, aiding early skin cell development.
33 citations
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October 2012 in “Journal of Morphology” Reptile skin hardens by layering beta-proteins on keratin.
93 citations
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May 1990 in “The EMBO Journal” Mice with extra sheep genes had hair that fell out and regrew in cycles.
73 citations
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January 2016 in “International review of cell and molecular biology” Cornification evolved from keratinization in vertebrates, with differences between mammals and sauropsids.
72 citations
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December 2018 in “Journal of Experimental Zoology Part B Molecular and Developmental Evolution” Corneous beta-proteins evolved uniquely in reptiles and birds, forming scales, claws, beaks, and feathers.