1OX4:
reference: Toward understanding the mechanism of the complex cyclization reaction catalyzed by imidazole glycerolphosphate synthase: crystal structures of a ternary complex and the free enzyme., Chaudhuri BN, Lange SC, Myers RS, Davisson VJ, Smith JL, Biochemistry 2003 Jun 17;42(23):7003-12. PMID: 12795595

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