Essential amino acids.
D000601:Amino Acids, Essential / Q000266:history* / Q000378:metabolism; D000818:Animals; D001671:Biochemistry / Q000266:history; D004044:Dietary Proteins; D049673:History, 20th Century; D006801:Humans; D008297:Male; D051379:Mice; D009584:Nitrogen / Q000378:metabolism
D000601:Amino Acids, Essential; D004044:Dietary Proteins; D009584:Nitrogen