KCNA3 and autoimmune disease: Memory B cells are thought to contribute to pathogenesis of autoimmune disorders and potassium channel activity in these cells may potentiate this.95 Memory B cells with class‐switched BCRs (IgD−) have enhanced potassium efflux currents from both voltage‐gated (Kv1.3) and calcium‐activated (KCa3.1) potassium channels in comparison to naive, and IgD−CD27− and IgD+CD27+ memory B cells.