Alpha-aminoadipic semialdehyde dehydrogenase (ALDH7A1) catalyzes the reaction of alpha-aminoadipic semialdehyde and NAD+ to form alpha-aminoadipate and NADH + H+ (Mills et al. 2006). Unpublished crystallographic data (PDB 2J6L) indicate that the enzyme is a homodimer. Recent immunofluorescence studies of both endogenous and GFP-tagged ALDH7A1 proteins in cultured human embryonic kidney cells indicate that the protein is present in both mitochondria and the cytosol (Wong et al. 2010).