Identification of the major cytochrome P-450 form transplacentally induced in neonatal rabbits by 3,3,7,8-tetrachlorodibenzo-p-dioxin.

of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)'treated adult rabbits. The major cytochrome P-450 species,' form 4, and a second species, form 6, were highly purified from this source (3-6). A variety of criteria has been established in this laboratory by which these two forms can be identified