Specificity: Recognizes a band (P450 2E1) in human liver microsomes. Reactive with 0.2 ug of recombinant human P450 2E1. Only slightly cross-reacts with recombinant human P450 1A1 after prolonged incubation. Does not cross-react with recombinant human cytochromes P450 1A2, 3A4 or 2C10.