Human NKG2D ligand 2 (ULBP2) ELISA Kit

Human cytomegalovirus (CMV) frequently infects young people and persists for the lifetime of the individual in a latent state, due in part to downregulation of major histocompatibility (MHC) class I expression and evasion of T cell-mediated immunity, with occasional asymptomatic episodes of viral shedding. Instead of a transmembrane domain, ULBP3 has a putative glycosylphosphatidylinositol (GPI) linkage to the membrane. Enzymatic analysis confirmed that the ULBPs are indeed GPI-linked at the cell surface. RT-PCR analysis detected ULBP expression in T, B, and erythroleukemia cell lines and in a wide range of tissues. Expression was upregulated in colon and stomach tumors and downregulated in kidney tumors. FACS analysis demonstrated that protein expression generally correlated with message expression.

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Human NKG2D ligand 2 (ULBP2) ELISA Kit has high sensitivity and excellent specificity for detection of Human ULBP2. No significant cross-reactivity or interference between Human ULBP2 and analogues was observed.

This Human NKG2D ligand 2 (ULBP2) ELISA Kit employs a two-site sandwich ELISA to quantitate ULBP2 in samples. An antibody specific for ULBP2 has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and anyULBP2 present is bound by the immobilized antibody. After removing any unbound substances, a biotin-conjugated antibody specific for ULBP2 is added to the wells. After washing, Streptavidin conjugated Horseradish Peroxidase (HRP) is added to the wells. Following a wash to remove any unbound avidin-enzyme reagent, a substrate solution is added to the wells and color develops in proportion to the amount of ULBP2 bound in the initial step. The color development is stopped and the intensity of the color is measured.

• Do not mix components from different kit lots or use reagents beyond the kit expiration date.• Allow all reagents to warm to room temperature for at least 30 minutes before opening.• Pre-rinse the pipet tip with reagent, use fresh pipet tips for each sample, standard and reagent to avoid contamination.• Unused wells must be kept desiccated at 4 °C in the sealed bag provided.• Mix Thoroughly is very important for the result. It is recommended using low frequency oscillator or slight hand shaking every 10 minutes.• It is recommended that all samples and standards be assayed in duplicate or triplicate.