1EA0:
reference: Cross-talk and ammonia channeling between active centers in the unexpected domain arrangement of glutamate synthase., Binda C, Bossi RT, Wakatsuki S, Arzt S, Coda A, Curti B, Vanoni MA, Mattevi A, Structure Fold Des 2000 Dec 15;8(12):1299-308. PMID: 11188694

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