SLAMF1 and Burkitt lymphoma: The Burkitt lymphoma cell lines Raji, Namalwa 12 (EBV+), and BJAB (EBV−) expressed SLAMF1/CD150 at a moderate level; all other B cell lines tested (REH, Ramos, B104, and RPMI-8226) were SLAMF1/CD150 negative [32].