2SIV:
reference: Crystal structure of the simian immunodeficiency virus (SIV) gp41 core: conserved helical interactions underlie the broad inhibitory activity of gp41 peptides., Malashkevich VN, Chan DC, Chutkowski CT, Kim PS, Proc Natl Acad Sci U S A 1998 Aug 4;95(16):9134-9. PMID: 9689046

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