1B5D:
reference: Crystal structure of deoxycytidylate hydroxymethylase from bacteriophage T4, a component of the deoxyribonucleoside triphosphate-synthesizing complex., Song HK, Sohn SH, Suh SW, EMBO J 1999 Mar 1;18(5):1104-13. PMID: 10064578

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