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Structures of Escherichia coli GTP cyclohydrolase II (GCH II). Cartoon representation of Escherichia coli GCH II in apo form (PDBID: 2BZ1) revealing the intrinsic metal binding (left). Crystal Structure of Escherichia coli GCH II in complex with GMPCPP and Zinc (PDBID: 2BZ0) enlightening the inhibitor binding (right). Zinc is shown as grey ball.
