2V54:
reference: Crystal structure of poxvirus thymidylate kinase: an unexpected dimerization has implications for antiviral therapy., Caillat C, Topalis D, Agrofoglio LA, Pochet S, Balzarini J, Deville-Bonne D, Meyer P, Proc Natl Acad Sci U S A. 2008 Nov 4;105(44):16900-5. Epub 2008 Oct 29. PMID: 18971333

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