Invitrogen
The Human Soluble CD137 (4-1BB) (Hu CD137) ELISA quantitates Hu CD137 in human serum or cell culture medium. The assay will exclusively recognize both natural and recombinant Hu CD137.
Principle of the method
The Human CD137 solid-phase sandwich ELISA (enzyme-linked immunosorbent assay) is designed to measure the amount of the target bound between a matched antibody pair. A target-specific antibody has been pre-coated in the wells of the supplied microplate. Samples, standards, or controls are then added into these wells and bind to the immobilized (capture) antibody. The sandwich is formed by the addition of the second (detector) antibody, a substrate solution is added that reacts with the enzyme-antibody-target complex to produce measurable signal. The intensity of this signal is directly proportional to the concentration of target present in the original specimen.
Rigorous validation
Each manufactured lot of this ELISA kit is quality tested for criteria such as sensitivity, specificity, precision, and lot-to-lot consistency. See manual for more information on validation.
CD137, also known as TNFRSF9 or 4-1BB, is an inducible costimulatory molecule expressed mainly on activated T cells. Its ligand, known as 4-1BBL, is expressed on activated macrophages, mature B cells, hematopoietic stem cells, and myeloid progenitor cells. CD137 signaling leads to maintaining the survival of activated T cells and CD8+ memory T cells, and clonal expansion of T cells, but also to suppressing myelopoiesis and dendritic cell development. Triggered CD137 induces a cytokine release profile regulating peripheral monocyte survival. Soluble forms of CD137 may provide negative control mechanism for some immune responses.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Gene aliases : 4-1BB, CD137, CDw137, ILA, TNFRSF9
Gene ID : (Human) 3604
Gene symbol : TNFRSF9
Protein Aliases : 4-1BB ligand receptor, CDw137, T-cell antigen 4-1BB homolog, T-cell antigen ILA, CD137, CD137 antigen, homolog of mouse 4-1BB, induced by lymphocyte activation (ILA), interleukin-activated receptor, homolog of mouse Ly63, receptor protein 4-1BB, T cell antigen ILA, Tumor necrosis factor receptor superfamily member 9, tumor necrosis factor receptor superfamily, member 9
UniProt ID (Human) Q07011
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