James Bertram Collip (November 20, 1892 – June 19, 1965) was a Canadian biochemist who was part of the Toronto group which isolated insulin.

[3] Born in Belleville, Ontario, he enrolled at Trinity College at the University of Toronto at the age of 15, and studied physiology and biochemistry.

In 1915, at the age of 22, Collip accepted a lecturing position in Edmonton in the department of physiology at the University of Alberta Faculty of Medicine, shortly before completing his doctorate.

[4] At some point between January 17 and 24, Collip and Banting reportedly had a physical altercation in the labs, supposedly when "Collip visited Banting and Best in their lab and told them that he wasn’t going to share the latest extract formulation (which may or may not have had Macleod's blessing) and that he was contemplating leaving the research team and patenting the process on his own".

A colleague later lampooned this incident with a "cartoon showing Banting sitting on Collip and titled 'The Discovery of Insulin.

[4] Following this early success, Collip returned to Edmonton to take up a position as Head of the new Department of Biochemistry, and to pursue his own studies on hormone research.