Frederick Banting in the blood which was then excreted in urine. Attempts to extract insulin from ground-up pancreas cells were unsuccessful, likely because of the destruction of the insulin by the proteolysis enzyme of the pancreas. The challenge was to find a way to extract insulin from the pancreas prior to its being destroyed. Moses Barron published an article in 1920 which described experimental closure of the pancreatic duct by ligature; this further influenced Banting's thinking. The procedure caused deterioration of the cells of the pancreas that secrete trypsin which breaks down insulin, but it left the islets of Langerhans intact. Banting
Banting (crater) a large patch of lunar mare. Maria like Mare Serenitatis are dark, smooth areas created by lava pooling on the surface and then cooling, covering up any previously existing craters. They were originally called "maria" ("seas") because astronomers believed they were bodies of water. Banting is flanked by two U.S. lunar landing sites – those of Apollo 15 and 17 – which lie several hundred miles on either side of the crater. Mare Serenitatis is frequently perceived to be the eastern eye of the Man in the Moon. The Man in the Moon is on the near side of the