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Characterization of the estrogen-induced uterine peroxidase by microelectrophoresis

CC Phillips Burnett, WA Anderson and R Ruchel

Estrogen-dependent peroxidase from rat uterine fluid has been investigated by microelectrophoretic techniques. The molecular weight of the enzyme has been determined in the range of 100,000 by using polyacrylamide gradient gels in the absence and presence of nonionic and anionic detergent. The isoelectric points are located between pH 4.5 and 5.9. Employing the two-dimensional combination of isoelectric focusing and gel gradient electrophoresis, the enzyme was separated into two subunits, one having a molecular weight of 70,000, the other less than 20,000. The large subunit has slight enzymatic activiy, while the smaller subunit may be responsible for the charge difference in the holoenzyme pattern. The glycoprotein pattern of the uterine fluid peroxidase is further defined by its separation by affinity chromatography using a concanavalin A-Sepharose column and by its susceptibility to neuraminidase treatment.

Volume 26, Issue 5, pp. 382-390, 05/01/1978
Copyright © 1978 by The Histochemical Society


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