https://www.profacgen.com/enzyme-activity-assay-service.htm A fundamental task of proteins is to act as enzymes—catalysts that increase the rate of virtually all the chemical reactions within cells. Enzymes play important roles in numerous physiological activities, including metabolic processes, cellular signaling and regulation, cell division and apoptosis. In addition, many of them become critical targets for diseases treatments. For example, matrix metalloproteinase (MMP) plays critical role in anti-tumor metastasis.