Store all components and reagents of the Thrombin Receptor (TR) ELISA Kit refrigerated and +4 degrees Celcius. For a long term storage the kit's components may be frozen at -20 but cycles of freezing and thawing should be strictly avoided as they denaturate the polypeptide chains in the antibodies and controlls, thus causing a reduction in the kit's detection ability and specificity which changes will lead to inconsistant results.
The receptors are ligand binding factors of type 1, 2 or 3 and protein-molecules that receive chemical-signals from outside a cell. When such chemical-signals couple or bind to a receptor, they cause some form of cellular/tissue-response, e.g. a change in the electrical-activity of a cell. In this sense, am olfactory receptor is a protein-molecule that recognizes and responds to endogenous-chemical signals, chemokinesor cytokines e.g. an acetylcholine-receptor recognizes and responds to its endogenous-ligand, acetylcholine. However, sometimes in pharmacology, the term is also used to include other proteins that are drug-targets, such as enzymes, transporters and ion-channels.