A novel 34 kDa glutathione-binding protein in mature rat ovary.

A novel protein that binds to a glutathione-Sepharose affinity column has been detected in mature, but not immature, rat ovary. This protein could be resolved from all identifiable components when the affinity-purified material, containing primarily glutathione transferases, was analyzed on reversed phase-HPLC. The unidentified protein migrated with an apparent molecular weight of 34 kDa on SDS-PAGE. After purification by affinity chromatography and subsequent preparative electrophoresis, the protein was subjected to N-terminal amino acid sequence analysis. The sequence obtained demonstrated a high degree of homology with an internal amino acid sequence in human carbonyl reductase (EC 1.1.1.184).