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The aquaporins are a family of transmembrane proteins that function as molecular water channels. Recently, a mercurial-insensitive water channel [MIWC or aquaporin-4 (AQP4)] has been cloned, and its mRNA was found to be expressed strongly in kidney inner medulla and several nonrenal tissues. We prepared affinity-purified polyclonal antipeptide antibodies to(More)
The aquaporins are a family of water channels expressed in several water-transporting tissues, including the kidney. We have used a peptide-derived, affinity-purified polyclonal antibody to aquaporin-3 (AQP-3) to investigate its localization and regulation in the kidney. Immunoblotting experiments showed expression in both renal cortex and medulla, with(More)
To test the hypothesis that the abundance of the apical urea transporter of the inner medullary collecting duct (IMCD) is regulated in vivo by factors associated with altered water balance, immunoblots of rat inner medullary membrane fractions were probed with rabbit polyclonal antibodies against the renal urea transporter (RUT) gene product. In inner(More)
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