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April 2014 in “The journal of investigative dermatology/Journal of investigative dermatology” Loss of keratin K2 causes skin problems and inflammation.
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March 2011 in “PLoS Biology” Birds can lose neck feathers due to a genetic change that increases a gene's activity, helping them adapt to heat.
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August 2005 in “The American Journal of Dermatopathology” The study concluded that PKP1 is essential for skin integrity and hair growth, and its dysfunction causes the symptoms of ectodermal dysplasia/skin fragility syndrome.