Human BTLA (B- and T-lymphocyte attenuator) Microsample ELISA Kit

The test principle applied in this kit is Sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre-coated with an antibody specific to Human BTLA. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Human BTLA. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added, only those wells that contain Human BTLA, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450nm ± 10nm. The concentration of Human BTLA in the samples is then determined by comparing the OD of the samples to the standard curve.Detection Range: 0.47-30 ng/mL. Sensitivity: 0.22 ng/mL. Assay Type: Sandwich. Standard: 30 ng/mL. Sample Type: sSerum, plasma, urine, tissue homogenates, cell culture supernates and other biological fluids. Assay duration: 3.5h. Protein Function: Inhibitory receptor on lymphocytes that negatively regulates antigen receptor signaling via PTPN6/SHP-1 and PTPN11/SHP-2 (PubMed:12796776, PubMed:14652006, PubMed:15568026, PubMed:18193050). May interact in cis (on the same cell) or in trans (on other cells) with TNFRSF14 (PubMed:19915044). In cis interactions, appears to play an immune regulatory role inhibiting in trans interactions in naive T cells to maintain a resting state. In trans interactions, can predominate during adaptive immune response to provide survival signals to effector T cells (PubMed:19915044) [The Uniprot Consortium]