Northern blot analysis of proto-lbc mRNA expression in human tissues (A) and human cancer cell lines HL-60 (promyelocytic leukemia), HeLa (cervical epitheloid carcinoma), K-562 (erythroleukemia), MOLT-4 (lymphoblastic leukemia), Raji (Burkitt’s lymphoma), SW480 (colorectal adenocarcinoma), A549 (lung carcinoma), and G361 (melanoma). (B) Northern blots were obtained from Clontech.