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V3 sequences of gp120 immunogens and from the F317X breakthrough viruses found in two vaccine recipients.a
V3 sequences with HxB2 numbering according to (Ratner et al., 1987). Underlined residues represent positions 307 and 317. Amino acids designated in blue differ from A244; red differ from MN; green differ from both the A244 and MN boosting protein immunogens.
