上浒充通大学 SHANGHAI JIAO TONG UNIVERSITY TONG I.Overview of Regulation 8.1 Major modes of regulation Regulation is the change in amount and activity of proteins(enzymes) Scarce protein-10 copies Abundant protein-100,000 copies Rate of synthesis of proteins can change over 1000 fold range Activity change of enzymes CHEN FENG,School of Life Sciences and Biotech.CHEN FENG，School of Life Sciences and Biotech. I. Overview of Regulation 8.1 Major modes of regulation Regulation is the change in amount and activity of proteins (enzymes) • Scarce protein-10 copies • Abundant protein-100,000 copies • Rate of synthesis of proteins can change over 1000 fold range • Activity change of enzymes