GCSAM and lymphoma: Of note, the P493-6 cell line expresses much lower levels of some BL-associated (and GC B cell expressed) cellular proteins in comparison to the N1, N3 and N4 stable cell lines derived from the ΔEBNA2 + Myc lymphomas (Fig 8B), including CD10, GCSAM, BACH2, and CD179B (IGLL1).