SYK is expressed in a panel of DLBCL cell lines. (A) Expression of SYK mRNA in a panel of 10 GCB-type or ABC-type DLBCL cell lines by real-time PCR. PKG1 was used as the internal control gene for normalization. Results were expressed as relative expression to SUP-M2, a T-cell lymphoma cell line that does not express a significant amount of SYK. Error bars show means ± SD from 3 independent experiments with duplicate reactions. (B) Expression of SYK protein in the cell lines by immunoblotting. β-actin was included as a loading control. (C) Correlation between SYK mRNA and protein levels was analyzed by linear regression. The level of significance was set at P = .05.