Basic introduction Chinese name: James B. Sumner mbth: James Batcheller Sumner Date of birth:1887165438+10/9 Date of death:1August, 955 12 People's achievements and achievements. In the 1920s, sumner thought that the enzyme was protein. Starting from 19 17, he began to separate and purify urease from bean powder (there are many urease in beans, which are easy to determine). 1926, he successfully isolated a protein with strong urease activity. This is the first crystalline enzyme obtained in the history of biochemistry, and it is also the first evidence that the enzyme is protein, which promotes the development of enzymology. 1937, he obtained the crystals of catalase and purified several other enzymes. Because of the work of urease and other enzymes, he won the 1946 Nobel Prize in chemistry. His works include Biochemistry Textbook, Chemistry and Methods of Enzymes (co-authored with G.F. Summers) and Enzyme-Chemistry and Its Mechanism of Action (co-edited with K. Mayerback), the latter two books have been translated into Russian and other languages. Sumner was born in a wealthy family in Massachusetts, USA, one day in 1887+0 1 year. His parents cultivated many interests of sumner since childhood, especially hunting. When sumner Jr. can carry a gun, he hunts around with his friends all day. When sumner/Kloc-was 0/7 years old, an unfortunate thing happened. Great changes have taken place in his life and thoughts. One day, he went hunting with some friends, and his friend's shotgun went off and hurt his left arm. Sumner, who woke up in pain, suffered from a broken left arm, but sumner soon realized that he could not be so depressed. His life is long, and he has to face many things. Sumner decided to go back to school and try to do many things with one hand. At this time, he can't bow to fate. It's easier said than done. His life was seriously affected by the loss of his left arm. For example, when he is frozen, he often falls down because of the center of gravity. When playing tennis, he can't hold the racket with both hands, so his speed is very slow. But none of this has shaken sumner's determination. He has a full schedule every day, either exercising or studying. After a long time, his body is strong again and his study has been greatly improved. Only then did he realize that the pillar of life is a strong heart.