2HVP:
reference: Three-dimensional structure of aspartyl protease from human immunodeficiency virus HIV-1., Navia MA, Fitzgerald PM, McKeever BM, Leu CT, Heimbach JC, Herber WK, Sigal IS, Darke PL, Springer JP, Nature 1989 Feb 16;337(6208):615-20. PMID: 2645523

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