pancreatic islet insulin level 2013-11-05T16:59:50Z CMO:0001857 JSmith The amount of insulin in a specified sample of pancreatic islet tissue, i.e. one or more of the islets of Langerhans, the small, encapsulated, irregular, microscopic structures scattered throughout the pancreas and comprising its endocrine portion. The pancreas is the elongated, racemose gland containing both endocrine and exocrine elements which secretes hormones such as insulin and glucagon internally and digestive enzymes externally. Insulin is the fuel-regulating peptide hormone which is formed from proinsulin in the beta cells of the pancreatic islets and which promotes the storage of glucose and the uptake of amino acids, increases protein and lipid synthesis, and inhibits lipolysis and gluconeogenesis. clinical_measurement_ontology pancreatic islet protein/peptide composition measurement