CD226 and B-cell non-Hodgkin lymphoma: CD226 expression was measured at the mRNA level by quantitative reverse transcription-PCR (qRT-PCR) in EBV-negative B-cell lymphoma cell lines BJAB, BL41, and DG75, LCLs derived from 11 different donors, EBV-infected latency I Burkitt lymphoma cell lines Awia clone 9 and Rael, and Wp-restricted (EBNA2-deleted) Burkitt lymphoma cell lines Sal-BL and Oku-BL (16).