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) name the small craters around it with the same name followed by different letters of the alphabet. The new policy allowed deceased scientists who had contributed to biological knowledge, like Dr. Banting – as well as scientists from other fields and contributors to culture and knowledge, such as writers, composers, and artists – to have craters named after them. Previously, only the names of astronomers, others who had made important contributions to astronomy, and historical philosophers had been used. Banting is a "simple" impact crater. It is located in the Sea of Serenity, which is also known as Mare Serenitatis,