. "ornithine"@en-us . "0.625"^^ . "an amino acid that does not occur in proteins but is important in the formation of urea"@en-us . "an amino acid that does not occur in proteins but is important in the formation of urea"@en-us . "113771020"@en-us . . . "ornithine"^^ . "0"^^ . "114607378"^^ . . . . . . "14607378-n"^^ . .