1ECG:
reference: Structure and function of the glutamine phosphoribosylpyrophosphate amidotransferase glutamine site and communication with the phosphoribosylpyrophosphate site., Kim JH, Krahn JM, Tomchick DR, Smith JL, Zalkin H, J Biol Chem 1996 Jun 28;271(26):15549-57. PMID: 8663035

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