Steady-state MCT-1 protein levels in a panel of transformed B-cell lines derived from patients with non-Hodgkin lymphoma. Western blotting was performed with MCT-1 polyclonal antibody on 40 μg total protein from 7 transformed B-cell lines. Results showed that most B-cell lines expressed high levels of MCT-1 protein and that MCT-1 levels are closely correlated with PCNA expressions in these cell lines. Jurkat and PBL cells served as positive and negative controls for MCT-1 signals, respectively.