- Molecular analysis of two genes of the Escherichia coli gab cluster: nucleotide sequence of the glutamate:succinic semialdehyde transaminase gene (gabT) and characterization of the succinic semialdehyde dehydrogenase gene (gabD). Bartsch, K., von Johnn-Marteville, A., Schulz, A. J. Bacteriol. (1990)