3N3I:
reference: Insights into the mechanism of drug resistance: X-ray structure analysis of G48V/C95F tethered HIV-1 protease dimer/saquinavir complex., Prashar V, Bihani SC, Das A, Rao DR, Hosur MV, Biochem Biophys Res Commun. 2010 May 13. PMID: 20471372

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