1WUR:
reference: Novel reaction mechanism of GTP cyclohydrolase I. High-resolution X-ray crystallography of Thermus thermophilus HB8 enzyme complexed with a transition state analogue, the 8-oxoguanine derivative., Tanaka Y, Nakagawa N, Kuramitsu S, Yokoyama S, Masui R, J Biochem (Tokyo) 2005 Sep;138(3):263-75. PMID: 16169877

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