2Y0F:
reference: Structure of the E-1-hydroxy-2-methyl-but-2-enyl-4-diphosphate synthase (GcpE) from Thermus thermophilus., Rekittke I, Nonaka T, Wiesner J, Demmer U, Warkentin E, Jomaa H, Ermler U, FEBS Lett. 2010 Dec 15. PMID: 21167158

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