... SIV variants were isolated from an infected animal at early, intermediate, and late stages of infection, and these sequential variants were used to infect a new set of macaques [17] To evaluate ... intermediate and late variants also had no length variation, while others demonstrated extensive variation (up to 80% in one animal) Although animals infected with the late variants had more length variation ... SalazarGonzalez JF, Salazar MG, Kilby JM, Saag MS, Komarova NL, Nowak MA, Hahn BH, Kwong PD, Shaw GM: Antibody neutralization and escape by HIV-1 Nature 2003, 422(6929):307-312 Kimata JT Mozaffarian,...