ID 4.1.1.75 DE 5-guanidino-2-oxopentanoate decarboxylase. AN 2-oxo-5-guanidinopentanoate carboxy-lyase. AN 2-oxo-5-guanidinopentanoate decarboxylase. AN 2-oxo-5-guanidinovalerate alpha-ketoarginine decarboxylase. CA 5-guanidino-2-oxo-pentanoate = 4-guanidinobutanal + CO(2). CF Divalent cation; Thiamine diphosphate. //