Serum immunoreactive insulin was measured with the use of a standard double - antibody radioimmunoassay method with kits produced by Incstar (Stillwater, MN). (academic.oup.com)
Growth hormone release - inhibiting hormone (somatostatin), a hypothalamic peptide that inhibits the release of growth hormone and also the secretion of insulin glucagon, and gastrin, was found in the rat stomach and pancreas in a concentration similar to that in the hypothalamus, as measured by radioimmunoassay. (science.sciencemag.org)
Plasma immunoreactive ghrelin was measured with a commercially available radioimmunoassay (Phoenix Pharmaceuticals, Belmont, CA) with lower and upper detection limits of 80 and 2500 pg / mL, respectively; an intraassay CV of 8.7 %; and an interassay CV of 14.6 %. (academic.oup.com)