[Biosynthesis of vitamin D].
D000818:Animals; D002112:Calcifediol / Q000097:blood; D002762:Cholecalciferol / Q000096:biosynthesis; D006801:Humans; D051381:Rats; D012867:Skin / Q000378:metabolism; D014807:Vitamin D / Q000096:biosynthesis*
D014807:Vitamin D; D002762:Cholecalciferol; D002112:Calcifediol