Three types of opioid receptors have been cloned: mu, delta, and kappa. Opioid receptors are seven transmembrane G-protein coupled receptors. They share a high degree of homology and are most divergent at the N- and C-termini. Activation of mu opioid receptors leads to a decrease in neuronal excitability. Most actions of exogenous opioids, such as morphine, are mediated through the µ-opioid receptor, including analgesia, tolerance and reward. In general, opioids modulate numerous central and peripheral processes including pain perception,neuroendocrine secretion and the immune response. The opioid signal is transduced from receptors through G proteins to various different effectors. Subsequent to G protein activation, several effectors are known to orchestrate the opioid signal. For example, activation of opioid receptors increases phosphatidylinositol turnover, activates K+ channels and reduces adenylyl cyclase and Ca++ channel activities.||AA Sequence:|NH2-Cys-Glu-Ala-Glu-Thr-Ala-Pro-Leu-Pro-COOH||Source:|Synthetic||Molecular Weight:|930.1||Applications:|Suitable for use as a blocking peptide. Other applications not tested.||Storage and Stability:|Lyophilized powder may be stored at -20°C. Reconstitute with sterile buffer or ddH2O. Aliquot and store at -20°C. Reconstituted product is stable for 6 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.

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