ID   1.2.1.99
DE   4-(gamma-glutamylamino)butanal dehydrogenase.
CA   (1) 4-(gamma-L-glutamylamino)butanal + H2O + NAD(+) = 4-(gamma-L-
CA   glutamylamino)butanoate + 2 H(+) + NADH.
CA   (2) 4-(gamma-L-glutamylamino)butanal + H2O + NADP(+) = 4-(gamma-L-
CA   glutamylamino)butanoate + 2 H(+) + NADPH.
CC   -!- The enzyme, characterized from the bacterium Escherichia coli,
CC       is involved in a putrescine catabolic pathway.
CC   -!- It has a broad substrate range, and can also catalyze the activities
CC       of EC 1.2.1.19 and EC 1.2.1.24.
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