Its receptor is a heterotetrameter of two extracellular alpha subunits disulfide bonded to two trans-membrane beta subunits. In most nonhepatic tissue
Its receptor is a heterotetrameter of two extracellular alpha subunits disulfide bonded to two trans-membrane beta subunits. In most nonhepatic tissues, it performs its function by increasing the number of certain plasma membrane transporters, while in the liver it works by helping to activate photodiesterase.  Its production is partly regulated by hormones known as incretins, and it is infused directly into the liver through the hepatic portal vein. In addition to its better known function, it also stimulates lipogenesis and regulates transcription. Produced by the beta cells of the islets of Langerhans, FTP, identify this hormone whose task it is to regulate blood glucose levels.
Its receptor is a heterotetrameter of two extracellular alpha subunits disulfide bonded to two trans-membrane beta subunits.
insulin