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
Frederick Banting In 1923, the Canadian Parliament granted him a Life Annuity of $7,500. In 1928 Banting gave the Cameron Lecture in Edinburgh. He was a member of numerous medical academies and societies in Canada and abroad, including the British and American Physiological Societies, and the American Pharmacological Society. In 1934 he was knighted as a Knight Commander of the Order of the British Empire (KBE) and became an active Vice-President of the Diabetic Association (now Diabetes UK). In May, 1935 he was elected a Fellow of the Royal Society. In 2004, Banting was inducted into the National Inventors Hall of Fame.