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Proportion of B-cell subsets in blood. In peripheral blood, transitional (CD24+ CD38+) represent 2.4%; naive (CD27-; IgD+) 65%; memory unswitched (CD27+; IgD+) 15%; memory switched (CD27+; IgD-) 13; plasmablasts/plasma cells (CD24-; CD38+) 1%; and others 2.5%. Out of memory switched B cells (inset), 23% are IgG+, 21% are IgA+: 21%, and 52% are IgM+ (IgM+ only or IgM+/IgD+).
