- Crystallization of the NADP(+)-dependent glutamate dehydrogenase from Escherichia coli. Korber, F.C., Rizkallah, P.J., Attwood, T.K., Wootton, J.C., McPherson, M.J., North, A.C., Geddes, A.J., Abeysinghe, I.S., Baker, P.J., Dean, J.L. J. Mol. Biol. (1993)