1VZV:
reference: Crystal structure of varicella-zoster virus protease., Qiu X, Janson CA, Culp JS, Richardson SB, Debouck C, Smith WW, Abdel-Meguid SS, Proc Natl Acad Sci U S A 1997 Apr 1;94(7):2874-9. PMID: 9096314

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