BCL2L1 and diffuse large B-cell lymphoma: Indeed, U2932 and another DLBCL cell line, SU-DHL-5, cells were found to express high levels of Mcl-1 as determined by Western blotting, and two other cell lines (SU-DHL-8 and RC-K8) expressed very high levels of Bcl-XL (Fig. 3a).