22 citations
,
December 2016 in “PloS one” A specific protein in chicken embryos links early skin layers to feather development.
38 citations
,
November 2018 in “Scientific Reports” Bird scales evolved from feathers, not reptile scales.
8 citations
,
January 2023 in “International journal of molecular sciences” Transglutaminase activity is important for skin and is found in both mammals and birds.
86 citations
,
April 2009 in “Journal of anatomy” Hard skin features like scales, feathers, and hair evolved through specific protein changes in different animal groups.
68 citations
,
April 2014 in “Journal of Investigative Dermatology” Trichohyalin-like proteins are essential for the development of skin structures like hair, nails, and feathers.