Enzyme crystallization

To prove whether enzymes were proteins or not, Sumner prepared very concentrated solutions and found that crystals of that same enzyme would form spontaneously. This was the first time enzymes were crystallized and therefore quite pure, and could be studied in great detail.
 James Batcheller Sumner United States 1926 Enzyme crystallization

To prove whether enzymes were proteins or not, Sumner prepared very concentrated solutions and found that crystals of that same enzyme would form spontaneously. This was the first time enzymes were crystallized and therefore quite pure, and could be studied in great detail.