Galectin-4, also known as LGALS4 or GAL4, is a protein that in humans is encoded by the LGALS4 gene. It is mapped to 19q13.2. Galectins are a family of animal lectins defined by an affinity for beta-galactoside-containing saccharides and by shared sequence elements. Galectin-4 is expressed as a 38-kD protein in the human colon adenocarcinoma T84 cell line. Galectin-4 is an S-type lectin that is strongly underexpressed in colorectal cancer, and this gene plays a role in cell adhesion. It has been found that decreased Galectin-4 expression occurs early in colorectal carcinogenesis.
Sample Type:Cell culture supernates, serum and plasma (heparin, EDTA)
Intended Use:For quantitative detection of human Galectin-4 in cell culture supernates, serum and plasma (heparin, EDTA).
Sensitivity:<10pg/ml
Range:156-10,000pg/ml
Specificity:Natural and recombinant human Galectin-4
Test Principle:This human Galectin-4 BioAssay™ ELISA Kit was based on standard sandwich enzyme-linked immune-sorbent assay technology. A monoclonal antibody from mouse specific for Galectin-4 has been precoated onto 96-well plates. Standards(E.coli, A2-I323) and test samples are added to the wells, a biotinylated detection polyclonal antibody from goat specific for Galectin-4 is added subsequently and then followed by washing with PBS or TBS buffer. Avidin-Biotin-Peroxidase Complex was added and unbound conjugates were washed away with PBS or TBS buffer. HRP substrate TMB was used to visualize HRP enzymatic reaction. TMB was catalyzed by HRP to produce a blue color product that changed into yellow after adding acidic stop solution. The density of yellow is proportional to the human Galectin-4 amount of sample captured in plate.
Kit Components:96-well plate precoated with human Galectin-4 antibody, 1Lyophilized recombinant human Galectin-4 standard, 10ng/tube×2Biotinylated human Galectin-4 antibody, 130ul (dilution 1:100)Avidin-Biotin-Peroxidase Complex (ABC), 130ul (dilution 1:100)Sample diluent buffer, 30mlAntibody diluent buffer, 12mlABC diluent buffer, 12mlTMB color developing agent, 10mlTMB stop solution, 10ml
Storage and Stability:Store powder at 4°C liquid at -20°C. Store other components at 4°C. Stable for at least 6 months For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
