Feather proteins during embyronic development.
D000818:Animals; D002247:Carbon Isotopes; D002642:Chick Embryo; D003545:Cysteine / Q000378:metabolism; D005241:Feathers; D066298:In Vitro Techniques; D011506:Proteins / Q000378:metabolism*
D002247:Carbon Isotopes; D011506:Proteins; D003545:Cysteine