label: gamma-guanidinobutyraldehyde dehydrogenase (NAD+) activity
label_lc: gamma-guanidinobutyraldehyde dehydrogenase (nad+) activity
description: "Catalysis of the reaction: 4-guanidinobutanal + H2O + NAD+ = 4-guanidinobutanoate + 2 H+ + NADH."