| Nomination for Nobel Prize in Physiology or Medicine | 
| Year: | 1939 | 
| Number: | 10 - 0 | 
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| Nominee 1: 
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| Name: | John H Northrop | 
| Gender: | M | 
| Year, Birth: | 1891 | 
| Year, Death: | 1987 | 
| Profession: | dept head | 
| University: | Rockefeller Institute for Medical Research (now  Rockefeller University) | 
| City: | New York | 
| State: | NY | 
| Country: | UNITED STATES (US) | 
| Awarded the Nobel Prize in Chemistry 1946 | 
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| Nominee 2: 
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| Name: | James B Sumner | 
| Gender: | M | 
| Year, Birth: | 1887 | 
| Year, Death: | 1955 | 
| Profession: | prof biochemistry | 
| University: | Cornell University | 
| City: | Ithaca | 
| State: | NY | 
| Country: | UNITED STATES (US) | 
| Awarded the Nobel Prize in Chemistry 1946 | 
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| Motivation: | Northrop: The purification, crystallization and method of action of pepsin and trypsin; purification of their pro-enzymes. 
Sumner: The purification and crystallization of the enzyme urease and the study of its action. | 
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| Nominator: 
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| Name: | Carl  Ten Broeck | 
| Gender: | M | 
| Profession: | dept head | 
| University: | Rockefeller Institute for Medical Research (now  Rockefeller University) | 
| City: | New York | 
| State: | NY | 
| Country: | UNITED STATES (US) | 
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