專業研究用書，無法提供教師樣書

內容簡介

Enzymes are biomolecules that catalyse chemical reactions. However the enzymes do not undergo permanent changes and so remain unchanged at the end of the reaction. They can only alter the rate of reaction but not the position of the equilibrium. Most chemical catalysts catalyse a wide range of reactions. They are not usually very selective. In contrast enzymes are usually highly selective catalyslng specific reactions only. This specificity is due to the shapes of the enzyme molecules. Nearly all known enzymes are proteins. Enzymes are needed almost in all biological processes to occur at significant rates in a cell. Modern biotechniques are utilised to improve microbial production strains to increase enzyme yields and to make minor amino acid changes that improve the functionality of the enzyme.