3OGQ:
reference: Structural basis for drug and substrate specificity exhibited by FIV encoding a chimeric FIV/HIV protease., Lin YC, Perryman AL, Olson AJ, Torbett BE, Elder JH, Stout CD, Acta Crystallogr D Biol Crystallogr. 2011 Jun;67(Pt 6):540-8. Epub 2011 May 12. PMID: 21636894

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