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Comparison of the genomic structures of Feline Immunodeficiency Virus (FIV) and Human Immunodeficiency Virus (HIV). Diagrams are shown for each virus genome as present in the integrated provirus, with organization of each respective Gag-Pol polyprotein shown below. LTR, long terminal repeat; f/s, frameshift; RRE, rev response element; Orf2, open reading frame 2; Vif, viral infectivity factor.
