Because the induction of apoptosis is a mechanism by which Fgl2 regulates FcγRIIB+ B cells32, we queried the frequency of caspase 3/7+ FcγRIIB+ vs FcγRIIB− CD8+ T cells within the WT and Fgl2−/− tumor specific populations. The gene discussed is CASP3; the disease is neoplasm.