HCK and lymphoma: To investigate whether the proteasome degradation mechanism was involved, after addition of PCLX-001 to BL2 cells for 24 or 48 h, we treated BL2 cells with the proteasome inhibitor MG132 or not for 6 h prior to harvesting and lysing the cells, and, measuring residual protein levels of not only Src and Lyn SFKs, but also hematopoietic cell kinase (Hck) and lymphocyte specific kinase (Lck) SFKs, both of which are also linked to lymphoma progression50.