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Molecular Pharmacology

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Research ArticleArticle

An Immunohistochemical Study on the Localization and Distribution of Epoxide Hydrolase within Livers of Untreated Rats

THOMAS T. KAWABATA, F. PETER GUENGERICH and JEFFREY BARON
Molecular Pharmacology November 1981, 20 (3) 709-714;
THOMAS T. KAWABATA
The Toxicology Center, Department of Pharmacology, College of Medicine, The University of Iowa, Iowa City, Iowa 52242, and Department of Biochemistry and Center in Environmental Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
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F. PETER GUENGERICH
The Toxicology Center, Department of Pharmacology, College of Medicine, The University of Iowa, Iowa City, Iowa 52242, and Department of Biochemistry and Center in Environmental Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
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JEFFREY BARON
The Toxicology Center, Department of Pharmacology, College of Medicine, The University of Iowa, Iowa City, Iowa 52242, and Department of Biochemistry and Center in Environmental Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
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Abstract

Antiserum produced against epoxide hydrolase (EC 3.32.3) which had been purified to apparent homogeneity from rat hepatic microsomes was employed in unlabeled antibody peroxidase-antiperoxidase and indirect fluorescent antibody staining techniques to investigate the localization and distribution of the enzyme within livers of untreated rats. Using both immunohistochemical procedures, staining for epoxide hydrolase was detected within hepatocytes throughout the liver. However, differences were noted in the intensity of immunohistochemical staining of hepatocytes within the liver lobule. Microfluorometric determinations of the relative extents of binding of the anti-epoxide hydrolase to hepatocytes within the three regions of the liver lobule revealed that, although midzonal and periportal hepatocytes bound the antibody to similar extents, centrilobular hepatocytes bound significantly more anti-epoxide hydrolase. Similar patterns of intralobular distribution for the anti-epoxide hydrolase were determined within livers of untreated male and female rats. Furthermore, similar intralobular patterns of immunohistochemical staining were observed within the right, median, left, and caudate lobes of the liver.

  • Copyright © 1981 by The American Society for Pharmacology and Experimental Therapeutics

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Molecular Pharmacology
Vol. 20, Issue 3
1 Nov 1981
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Research ArticleArticle

An Immunohistochemical Study on the Localization and Distribution of Epoxide Hydrolase within Livers of Untreated Rats

THOMAS T. KAWABATA, F. PETER GUENGERICH and JEFFREY BARON
Molecular Pharmacology November 1, 1981, 20 (3) 709-714;

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Research ArticleArticle

An Immunohistochemical Study on the Localization and Distribution of Epoxide Hydrolase within Livers of Untreated Rats

THOMAS T. KAWABATA, F. PETER GUENGERICH and JEFFREY BARON
Molecular Pharmacology November 1, 1981, 20 (3) 709-714;
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