C18H29N3O2S

C18H29N3O2S positron imaging ligands for the synthesis of metabotropic glutamate II receptor imaging. A metabotropic receptor is a type of membrane receptor of eukaryotic cells that acts through a second messenger. It may be located at the surface of the cell or in vesicles.[1] Based on their...

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C18H29N3O2S positron imaging ligands for the synthesis of metabotropic glutamate II receptor imaging. A metabotropic receptor is a type of membrane receptor of eukaryotic cells that acts through a second messenger. It may be located at the surface of the cell or in vesicles.[1]

Based on their structural and functional characteristics, the neurotransmitter receptor can be classified into two broad categories: metabotropic and ionotropic receptors. Ionotropic receptors form an ion channel pore. In contrast, metabotropic receptors are indirectly linked with ion channels on the plasma membrane of the cell through signal transduction mechanisms, often G proteins. Hence, G protein-coupled receptors are inherently metabotropic. Other examples of metabotropic receptors include tyrosine kinases and guanylyl cyclase receptors.[2]

Both receptor types are activated by specific neurotransmitters. When an ionotropic receptor is activated, it opens a channel that allows ions such as Na+, K+, or Cl− to flow. In contrast, when a metabotropic receptor is activated, a series of intracellular events are triggered that can also result in ion channels opening or other intracellular events, but involve a range of second messenger chemicals.


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