EZRIN wild-type (WT) and KD B-cell leukemias/lymphomas were then loaded with Indo-1, incubated with an Fcγ III/II receptor-blocking Ab (to prevent Ab–Ag immune complexes), and then strongly stimulated with anti-CD19+F(ab′)2-IgM 30 s rior to the measurement of Ca2+ flux. The gene discussed is CD19; the disease is lymphoma.