For studying the complete amino acid sequence of two polypeptide chains of Insulin, Nobel Prize was awarded to
LIST OF FEW NOBEL LAUREATES IN PHYSIOLOGY OR MEDICINE

Sir Ronald Ross: Life cycle of Plasmodium
I.P. Pavlov: Physiology of digestion
Robert Koch: Discoveries in Tuberculosis
Paul Ehrlich: Immunity
F.G. Banting & J.J.R. McLeod: Insulin
Willem Einthoven: ECG
Karl Landsteiner: Human blood groups
Sir Alexander Fleming: Penicillin
Paul H. Muller: DDT
S.A. Waksman: Streptomycin (First antibiotic, against TB)
Har Gobind Khorana: Interpretation of genetic code
Sir Godfrey N. Hounsfield: CT scan
J.E. Murray & E.D. Thomas: Organ and cell transplantation
Sir Peter Mansfield: MRI
B.J. Marshall & J.R. Warren: H. pylori; its role in peptic ulcer disease
H.Z. Hausen: HPV causing cervical cancer
F.B. Sinnoussi & L. Montagnair: HIV
Robert G. Edwards: In-vitro fertilization
Fredreich Sanger
Banting and Macleod
Paul Muller
Alexander Fleming