Abstract

We obtained evidence that a toxic coplanar polychlorinated biphenyl (PCB) induces a counterpart of murine 56kDa selenium binding protein in rat liver cytosol. A 54kDa protein in the liver cytosol was significantly induced by 3,3′,4,4′,5-pentachlorobiphenyl and proved to be a major cytosolic protein in the rat liver. The protein exhibited pI of 6.8 on two-dimensional gel electrophoresis. The amino acid sequence of peptide fragments from the protein digested in situ, was highly similar to a 56kDa selenium binding protein and similar to an acetaminophen binding protein in mice.

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