CD8A and HIV-1 infection: The difference in p24 peptide mapping between individuals homozygous for Bw4 and those homozygous for Bw6 is shown in Figure 6C. The ELISPOT assays confirmed the similar magnitude and breadth of the HIV-1-specific CD8 T-cell responses elicited by individual p24 peptides in individuals homozygous for Bw4 and individuals homozygous for Bw6 in the acute/early stage of HIV-1 infection.