Technical Data
CABP9K (CALB3, CABP1, S100G, S100 calcium binding protein G, CABP, Calbindin-D9k, MGC138379, Protein S100-G, S100 calcium-binding protein G, S100D, Vitamin D-dependent calcium-binding protein, intestinal)
Calcium (Ca+2 or Ca) is the most abundant cation and it is required for many physiological activities such as bone formation and it acts as a second messenger in signal transduction. However only 1% of Ca is present in ionic form in biological fluids. Ca concentration is regulated by calcitropic hormones that act on bone, kidney, and intestine. Extracellular Ca+-levels are sensed and regulated by Calcium Sensing receptor (CASR). When Ca levels are limiting then it must be taken up by active, transcellular pathways comprising (1) Ca++ entry across apical membrane, (2) cytosolic transport of Ca++ across the cell form apical to basolateral membrane facilitated by a family of low mol wt Calcium binding proteins (CABPs) that include vitamin D3-dependent Ca++ binding proteins (calbindin-D9k, Calbindin-28k, Calretinin, Parvalbumin, S100, calmodulin) and finally (3) an active extrusion of Ca++ through basolateral membrane mediated by Ca++-ATPase and Na+-Ca++ exchangers (NCX). Ca++ absorption in intestine and its reabsorption in kidney are carried out by Ca++ Transport (CaT) proteins, CaT-1, CaT-2 or Epithelial Ca Channel (ECAC1/ECAC2/CaT-Like (CaT-L) proteins.

Suitable for use in ELISA and Western Blot. Other applications not tested.

Recommended Dilution:
ELISA: 1:10,000-1:100,000 using 50-100ng of control peptide/well.
Western Blot: 1:1000-1:5000. D9K is ~9kD.
Optimal dilutions to be determined by the researcher.

Control Peptide:
C0104-55: CABP9K, Human (CALB3, CABP1) Control Peptide

Storage and Stability:
May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
50ul-20CBlue IceHumanRabbit
Not determined
A 14-aa peptide sequence, within the N-terminal Ca-binding domain of Human D9K (1) was synthesized, coupled to KLH
Supplied as a liquid, 0.05% sodium azide.
Recognizes human CABP9K. The peptide is 78% conserved in mouse, rat, bovine and porcine D9K. No significant sequence homology is seen with D28K or other CABPs.
Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.
1. Perret C et al (1988) Eur. J. Biochem. 172:43-51; 2. Howard A et al (1992) BBRC 185:663-669; 3. Jeung EB et al (1992) FEBS Lett. 307:224-228; 4. Jeung EB et al (1994) J. Mol. Biol. 235:1231-1238; 5. Colnot S et al (1998) JBC 273:31939-31946.