James Batcheller Sumner
 James Batcheller Summer | |
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| Born | James Batcheller Summer 19 November 1887 Canton, Massachusetts |
| Dee'd | 12 August 1955 (aged 67) Buffalo, New York |
| Naitionality | American |
| Alma mater | Harvard Varsity |
| Kent for | prove that the enzymes are proteins |
| Awairds |
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| Scientific career | |
| Fields | Chemistry |
| Institutions | Cornell Varsity |
James Batcheller Sumner (19 November 1887 – 12 August 1955) wis an American chemist. He discovered that the enzymes can be crystallized an he wis the first scientist wha proved that the enzymes are proteins. In 1946, Summer wis awairdit the Nobel Prize in Chemistry alang wi John Howard Northrop an Wendell Meredith Stanley.