Since B cell lymphomas are usually B cell receptor (BCR)-dependent, although lymphomatous B cells can occasionally survive without BCR signaling [37], we evaluated by flow cytometry the expression of other immunoglobulins, and observed that both cell lines maintained the expression of IgA, but not of IgD (Fig. S4A), suggesting that they may still preserve intact the BCR signaling. Here, BCR is linked to B-cell non-Hodgkin lymphoma.