. . . . "0"^^ . "0"^^ . . "110462322"@en-us . . . "an amino acid containing sulfur that is found in most proteins; oxidizes on exposure to air to form cystine"@en-us . "14604454-n"^^ . "114604454"^^ . . "113768152"@en-us . . "cysteine"^^ . . "cysteine"@en-us . "an amino acid containing sulfur that is found in most proteins; oxidizes on exposure to air to form cystine"@en-us .