Detection of P-glycoprotein with four monoclonal antibodies in normal and tumor tissues.


P-glycoprotein (Pgp), encoded by the multidrug-resistance gene (MDR1), is an active efflux pump for many structurally diverse lipophilic compounds. Using peroxidase-antiperoxidase immunohistochemistry technique and four anti-Pgp monoclonal antibodies directed against different epitopes of the molecule, we examined the distribution of Pgp in normal human… (More)


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