Immunophenotypic profiles of MC⁺ and MC⁻ patients' G6⁺, G6⁻, and total B cells. Data are flow cytometric analyses of PBMCs from HCV⁺MC⁺ (n = 9) and MC⁻ (n = 11; SVR = 2, HCV Ab⁻ = 2, HCV RNA⁺ = 6) subjects. Cell surface marker expression in each subject's G6⁺ and G6⁻ B cells is shown in the column graphs. The scatterplots represent expression of cell surface markers versus the proportion of total B cells that are G6⁺. In the scatterplots: ▴ represents MC⁺ patients; ▵, HCV RNA⁺ patients; and ◊, HCV RNA⁻ patients. MFI indicates geometric mean fluorescence intensity. The P values for the column graphs were determined using the Kruskal-Wallis and Dunn multiple comparison tests. *P < .05. **P < .01. n.s. indicates not significant (P > .05). Black bars represent medians. For the scatterplots, R was calculated using the Spearman correlation coefficient.