CYP2B6 and steatosis: In our recently published research, C57Bl/6J (B6)-Cyp2b9/10/13-null (Cyp2b-null) mice lacking the predominantly hepatic Cyp2b members, Cyp2b9, Cyp2b10, and Cyp2b13, are diet-induced obese in males with moderate increases in steatosis.