1B3B:
reference: Engineering activity and stability of Thermotoga maritima glutamate dehydrogenase. I. Introduction of a six-residue ion-pair network in the hinge region., Lebbink JH, Knapp S, van der Oost J, Rice D, Ladenstein R, de Vos WM, J Mol Biol 1998 Jul 10;280(2):287-96. PMID: 9654452

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