TNFRSF13B and acute lymphoblastic leukemia: BAFF-R and TACI transcripts were detected in all B-ALL lines, whereas BCMA was detected in 4 of them; their relative expression was stronger in pre-B-cell (207, SUP-B15, BLIN-1, NALM-6) than in pro-B-cell lines (REH, RS4;11; Figure 1A).