The concept of proteins having important biological functions emerged in the 19th century. In 1838, French chemist Anselme Payen isolated the first enzyme, diastase, which is now known as amylase, from malt. Further research revealed that enzymes were in fact proteins that could catalyze biochemical reactions without being used up in the process. By the early 1900s, scientists knew pr... https://logcla.com/blogs/425307/Understanding-Functional-Proteins-and-their-Various-Roles-in-the-Body