Frederick Banting realized that this procedure would destroy the trypsin-secreting cells but not the insulin. Once the trypsin-secreting cells had died, insulin could be extracted from the islets of Langerhans. Banting discussed this approach with J. J. R. Macleod, Professor of Physiology at the University of Toronto. Macleod provided experimental facilities and the assistance of one of his students, Charles Best. Banting and Best, with the assistance of biochemist James Collip, began the production of insulin by this means. As the experiments proceeded, the required quantities could no longer be obtained by performing surgery on living dogs. In November 1921, Banting hit
Banting (crater) 50 km east is a wrinkle ridge known as Dorsum Azara. "Banting" was one of approximately fifty new names for lunar craters adopted by the International Astronomical Union in 1973. Choosing the names was the first step in the adoption of a new policy that involved broadening crater nomenclature. The policy was created because of photographs taken by the Apollo spacecraft, which provided an extremely detailed and crater-populated lunar map, essentially proving that a greater variety of names would be needed. The practice that had previously been used was to name one large crater after a selected individual and to