Growth of sensitive DLBCL cells is inhibited by siRNA against SYK. (A) Immunoblots of SYK protein in LY18, LY7, and LY4 cells that were transfected with a scrambled (-) or a SYK-specific (+) siRNA pool. β-actin or GAPDH was blotted as a loading control. (B) Simultaneous cell counting was conducted at the indicated times after transfection. The -fold increase in cell number indicates viable cell number relative to those at time 0.