Frederick Banting upon the idea of obtaining insulin from the fetal pancreas. He removed the pancreases from fetal calves at a William Davies slaughterhouse and found the extracts to be just as potent as those extracted from the dog pancreases. By December 1921, he had also succeeded in extracting insulin from the adult pancreas. Pork and beef would remain the primary commercial sources of insulin until they were replaced by genetically-engineered bacteria in the late 20th century. In spring of 1922, Banting established a private practice in Toronto and began to treat diabetic patients. His first American patient was Elizabeth Hughes Gossett,
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