THE LOCALISATION OF IMMUNOREACTIVITY TO INSULIN, GLUCAGON AND GASTRIN IN THE GUT OF AMPHIOXUS (BRANCHIOSTOMA) LANCEOLATUS

摘要: Publisher Summary Certain cells in the intestine of Amphioxus contain substances that resemble mammalian glucagon, gastrin, and insulin at least a part their molecular structure. It is likely an animal whose ancestors probably branched off from main line vertebrate evolution even earlier than cyclostomes might have had insulin-like substance sufficiently similar to cyclostome. The presence material true gut cells, if substantiated, serves distinguish all higher animals where, adult form, insulin-producing are isolated intestine. In larval lamprey, which chordate form most nearly resembling Amphioxus, can be seen base its junction with esophagus before they become surrounding connective tissue. immuno-staining technique provide valuable pointers hormone-like substances; however, evidence alone inconclusive, particularly when hitherto unexplored fields being investigated.