1.2.1.99	physiological function	PuuC is a nonspecific aldehyde dehydrogenase that oxidizes all the aldehydes in putrescine catabolism. Strains lacking PuuC activity have a doubling time 50% greater than the wild type with putrescine as the sole nitrogen source. Strains with deletions of putrescine aminotransferase PatA and any of PuuA, PuuB, or PuuC do not grow with putrescine as the nitrogen source	740617