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EK000131-EK0503: Human L-Selectin ELISA Kit
Range 62.5pg/ml-4000pg/ml
Sensitivity < 5 pg/ml
Specificity: No detectable cross-reactivity with any other cytokine.
Application: For quantitative detection of human L-Selectin in sera, plasma, body fluids, tissue lysates or cell culture supernates.
Expiration: Four months at 4°C and eight months at -20°C.
Background
L-selectin, also known as CD62L, is a cell adhesion molecule found on leukocytes. It belongs to the selectin family of proteins, which recognize sialylated carbohydrate groups. It is cleaved by ADAM17.SELL ?L-selectin?is a cell surface component that is a member of a family of adhesion/homing receptors which play important roles in leukocyte-endothelial cell interactions. The molecule is composed of multiple domains: one homologous to lectins, one to epidermal growth factor, and two to the consensus repeat units found in C3/C4 binding proteins.1L-selectin acts as a "homing receptor" for leukocytes to enter secondary lymphoid tissues via high endothelial venules. Ligands present on endothelial cells will bind to leukocyte expressing L-selectin, slowing leukocyte trafficking through the blood, and facilitating entry into a secondary lymphoid organ at that point2.
Principle
L-Selectin ELISA Kit was based on standard sandwich enzyme-linked immune-sorbent assay technology. Human L-Selectin specific-specific polyclonal antibodies were precoated onto 96-well plates. The human specific detection polyclonal antibodies were biotinylated. The test samples and biotinylated detection antibodies were added to the wells 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 L-Selectin amount of sample captured in plate.
Reference
1."Entrez Gene: SELL selectin L (lymphocyte adhesion molecule.
http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=6402.
2?Cotran; Kumar, Collins (1998). Robbins Pathologic Basis of Disease. Philadelphia: W.B Saunders Company. ISBN 0-7216-7335-X.
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