2RKG:
reference: Ninety-nine is not enough: molecular characterization of inhibitor-resistant human immunodeficiency virus type 1 protease mutants with insertions in the flap region., Kozisek M, Saskova KG, Rezacova P, Brynda J, van Maarseveen NM, De Jong D, Boucher CA, Kagan RM, Nijhuis M, Konvalinka J, J Virol. 2008 Jun;82(12):5869-78. Epub 2008 Apr 9. PMID: 18400858

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