HIV-specific antibody response profiles clearly distinguished cases from other chronically infected patients, including typical LTNPs/ECs. (A-E) Antibody response profiles specific for the HIV-1 gene products gp41 (A), p24 (B), matrix (MA) protein (C), reverse transcriptase (RT; D), and integrase (E), as determined by the LIPS assay and reported in log₁₀ luminometer units (LU), are shown for the cases (C1, ×; C2, †; C3, ★; and C4, ◊), HIV-negative controls (n = 7), typical LTNPs/ECs (n = 12), and viremic progressors (Prog; n = 11). Horizontal lines represent median values. Comparisons were made using the Wilcoxon 2-sample test. Only P values referring to comparisons between the responses of the cases and other groups are shown.