IMMUNOCHEMICAL IDENTIFICATION AND LOCALIZATION OF CYTOCHROME P-450HSjISOZYME, AN ENZYME RELATED TO NITROSAMINE METABOLISM, IN HUMAN GASTRIC MUCOSA AND GASTRIC CARCINOMA-中国Betway体育网页登陆

摘要 Monoclonalantibody(MAb)toratlivercyto-chromeP-450jisozyme,anactivatingenzymespecifictonitrosaminemetabolism,wasusedcoupledwithimmunoblotting,densitometerscanningofSDS-PAGEgelsandimmunohistochemicaltechnique.ThetraceP-450HSjisozyme(Mr.51.5Kd)wasfoundinhumangastricmucosa.ItwassimilartoP-450jinmolecularweight,catalyticandimmunochemicalproperties.TheconcentrationsofP-450HSjinmucosaoflessercurvaturewerehigherthanthoseingreatercurvature.Thismightbeoneoftheimportantreasonsthatlessercurvatureisthecommonestareaforgastriccarcinoma.ButtherewaspossiblylessP-450HSjingastricmucosawithcancer.Im-munohistochemically,P-450HSjwasdiscoveredinthecytoplasmofsomeglandularepithelialcells,especiallyintheglandswithhyperplasticandintestinalmetaplasticchangesadjacenttocarcinoma.Itwasalsofoundinsomenormalglandsandintumorcellsofhigh-differentiatedadenocarcinoma,butnotinthoseoflow-differentia

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IMMUNOCHEMICAL IDENTIFICATION AND LOCALIZATION OF CYTOCHROME P-450HSjISOZYME, AN ENZYME RELATED TO NITROSAMINE METABOLISM, IN HUMAN GASTRIC MUCOSA AND GASTRIC CARCINOMA

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