CD19 and diffuse large B-cell lymphoma: Western blotting analysis demonstrated that the levels of SH3GL1 protein were elevated in DLBCL cells (BJAB, FARAGE, KIS‐1, SUDHL8, SUDHL4, CTB1, MEDB1, RIVA, SUDHL2 and U2932) relative to CD19+ B cells isolated from normal human peripheral blood mononuclear cells (Figure S1A).