- Targeted knockout of Cyp1a1 gene does not alter hepatic constitutive expression of other genes in the mouse [Ah] battery. Dalton, T.P., Dieter, M.Z., Matlib, R.S., Childs, N.L., Shertzer, H.G., Genter, M.B., Nebert, D.W. Biochem. Biophys. Res. Commun. (2000)