The K-Cl cotransporters mediate the coupled movement of K+ and Cl- ions across the cell membranes. This transport process is involved in the regulatory volume decrease in response to cell swelling in red cells and vectorial movement of Cl- ions across the kidney epithelia. The net direction of this transport is out of the cells. At least four isoforms of KCC identified (KCC1, KCC2, KCC3, and KCC4) have been identified and functionally characterized. KCC are predicted to have the same protein structure: 12 transmembrane domains with a large extracellular loop with potential N-glycosylation sites, and the cytoplasmic N and C-termini.

KCC3 is ~77% identical to KCC1. Alternative splicing of KCC3 transcripts generates KCC3 with different N-termini (1099 aa and 1150 aa). It is highly expressed in brain, heart, skeletal muscle, and kidney. KCC3 is modulated by VEGF and TNF-alpha.

Suitable for use in ELISA. Western Blot, though not tested, may potentially be used as an application. Other applications not tested.

Western Blot: 1-10ug/ml using Chemiluminescence technique. ELISA: 1:10,000-1:100,000 using 50-100ng of control peptide/well. Optimal dilutions to be determined by the researcher.

Control Peptide: K0131-05

May be stored at 4°C for short-term only. For long-term storage, store at -20°C. Aliquots are stable for at least 12 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.

A 17-aa peptide sequence within the cytoplasmic, C-terminus of human KCC3a (1150 aa; Hiki et al, 1999) ( KLH).

Supplied as a liquid in PBS, pH 7.4, 0.1% BSA, 0.05% sodium azide, 40% glycerol.

Purified by immunoaffinity chromatography.

Recognizes human KCC3a. Ssequence homology: both alternatively spliced forms of the human KCC3 (1099 aa) and KCC3a (1150 aa). Species sequence homology: mouse and monkey 100%; frog. 82%.