Sumner, James Batcheller (1887–1955)
US biochemist who shared the 1946 Nobel Prize in Chemistry
with John Northrup (1891–1987) and Wendell Stanley (1904–1971)
for his discovery that enzymes could by crystallized.
In 1926 Sumner isolated and crystallized the enzyme urease;
it was the first enzyme to be crystallized and this achievement finally
proved the protein nature of enzymes.