RBP4, Human, BioAssay(TM) ELISA Kit (Retinol-binding Protein 4, Plasma Retinol-binding Protein, PRBP, RBP, PRO2222)

Retinol binding protein (RBP) 4 is the only specific transport protein for vitamin A in the circulation whose function is to deliver vitamin to target tissues. In obesity and type 2 diabetes, expression of Glut4 is significantly impaired in adipocytes. Glucose transport via Glut4 is the rate-limiting step for glucose use by muscle and adipose tissue. Adipocyte-specific deletion of Gluts leads to notable elevation of RBP4 causing systemic insulin resistance, and that reduction of RBP4 improves insulin resistance. This identified a novel role of RBP4 in regulating insulin action and RBP4 is recorded as an adipocyte-derived hormone. The RBP4 (human) ELISA Kit is to be used for the in vitro quantitative determination of human RBP4 in biological fluids. This assay is a sandwich ELISA which utilizies a 96-well microtiter plate which was pre-coated with a monoclonal antibody and a purified polyclonal detection antibody. A HRP-conjugated anti-IgG, peroxidase and TMB (3,3',5,5'-tetramethylbenzidine) is added to generate a color intensity directly proportional to the concentration of RBP4 in the samples. This ELISA is specific for the measurement of natural and recombinant human RBP4. It does not cross-react with mouse RBP4, rat RBP4, human adiponectin, human resistin, human vaspin, human clusterin, human leptin, human IL-33, human GPX3, human progranulin, human FABP4, human ANGPTL3, human ANGPTL4, human ANG1, human ANG2, human Nampt, mouse Nampt. The assay range is 0.39-25ng RBP4/ml and a detection limit of 380pg/ml (based on adding 2 standard deviations to the mean value of the (50) zero standards).\n\nSample Type:\nCell and tissue culture supernatants, urine, plasma, serum, as well as many other biological fluids.\n\nIntended Use:\nFor the in vitro quantitative determination of human RBP4 in biological fluids.\n\nSensitivity:\n380pg/ml\n\nRange:\n0.39-25ng RBP4/ml\n\nSpecificity:\nMammalian\n\nTest Principle:\nThis assay is a sandwich ELISA which utilizies a 96-well microtiter plate which was pre-coated with a monoclonal antibody and a purified polyclonal detection antibody. A HRP-conjugated anti-IgG, peroxidase and TMB (3,3',5,5'-tetramethylbenzidine) is added to generate a color intensity directly proportional to the concentration of RBP4 in the samples. This ELISA is specific for the measurement of natural and recombinant human RBP4. It does not cross-react with mouse RBP4, rat RBP4, human adiponectin, human resistin, human vaspin, human clusterin, human leptin, human IL-33, human GPX3, human progranulin, human FABP4, human ANGPTL3, human ANGPTL4, human ANG1, human ANG2, human Nampt, mouse Nampt.\n\nKit Components:\nPre-coated Microtiter Plate: 12x8 well strips\nWash Buffer (10X): 1x50ml\nDiluent (5X):1x50ml\nDetection Antibody: 1x12ml\nDetector 100X (Hrp conjugated anti-IgG): 1x150ul\nHuman RBP4 Standard (lyophilized, 50ng): 1 vial\nHuman RBP4 QC Sample (lyophilized): 1 vial\nSubstrate Solution I (TMB): 1x6ml\nSubstrate Solution II (Peroxidase): 1x6ml\nStop Solution: 1x12ml\nPlate Sealers: 3 each\n\nStorage and Stability:\nStore powder at 4 degrees C liquid at -20 degrees C. Store other components at 4 degrees C. Stable for at least 6 months For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

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