6IK9:
reference: Active-site deformation in the structure of HIV-1 RT with HBV-associated septuple amino acid substitutions rationalizes the differential susceptibility of HIV-1 and HBV against 4'-modified nucleoside RT inhibitors., Yasutake Y, Hattori SI, Tamura N, Matsuda K, Kohgo S, Maeda K, Mitsuya H, Biochem Biophys Res Commun. 2019 Feb 19;509(4):943-948. doi:, 10.1016/j.bbrc.2019.01.026. Epub 2019 Jan 14. PMID: 30648556

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