APOBEC3B can deaminate nuDNA and 5-methylcytidine. The ability of A3Bi7 to edit nuDNA and 5Me-dC, hallmark activities of A3A, was investigated. A3B plasmids were transfected into 293T-UGI (uracil-DNA glycosylase inhibitor) cells, which stably express the UNG inhibitor UGI33, allowing ...