Sir Frederick Banting 1891-1941
Soldier, surgeon, and scientist, Banting in 1920 became convinced of the existence of a substance now known as Insulin. A laboratory provided by Dr. J.J.R. Macleod of the University of Toronto enabled Banting and Charles H. Best, in 1921, to prepare an active anti-diabetic extract of pancreas, purified by Dr. J.B. Collip. This was first used successfully on January 11, 1922, by Drs. W. R. Campbell and A.A. Fletcher. Banting shared with Macleod the Nobel Prize for medicine in 1923 and was knighted in 1934. Born near Alliston, Ontario, he died in the crash of a military aircraft in Newfoundland, on February 21, 1941.
Plaque via Alan L. Brown's site Toronto Plaques. Full page here.