How was James Batcheller Sumner awarded the Noble Prize?

Name: James Batcheller Sumner
Country: Massachusetts U.S.
Date of Bitrh: November 19, 1887 (Canton)
Date of Death: August 12, 1955 (Buffalo New York)
Subject of Study: Crystallization and Enzymes
Noble Prize Year: Nobel Prize for Chemistry with John Howard Northrop and Wendell Meredith Stanley, in 1946 to crystallize an enzyme (Sumner was the first), an achievement that revealed the protein nature of enzymes.
About: Sumner After crystallizing the enzyme urease in 1926, he went to Stockholm to study with Hans von Euler-Chelpin and Theodor Svedberg. He crystallized the enzyme catalase in 1937 and also contributed to the purification of several other enzymes. He was a professor at the Cornell University Medical School in Ithaca, New York, from 1929 to 1955 and became director in 1947 of the Cornell laboratory of enzyme chemistry, an institution that was established in recognition of his work.