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Chapter-17 Composition and Metabolism of Enzymes

BOOK TITLE: Essentials of Nutrition and Biochemistry for Basic BSc Nursing

Author
1. Clement I
ISBN
9789385891526
DOI
10.5005/jp/books/18059_18
Edition
1/e
Publishing Year
2018
Pages
13
Author Affiliations
1. VSS College of Nursing, Bangalore, VSS College of Nursing, Bengaluru, Karnataka, India, VSS College of Nursing, Nagadevanahalli, Mysore Ring Road, Bengaluru, Karnataka, India, VSS College of Nursing, No. 78, Nagadevenahalli, Mysore Ring Road, Bengaluru, India, VSS College of Nursing Nagadevanahalli, Bengaluru, Karnataka, India, VSS College of Nursing, Nagadevanahalli, Bengaluru, Karnataka, India, VSS College of Nursing, Nagadevanahalli, Bengaluru (Karnataka), India, Columbia College of Nursing, Bengaluru, Karnataka, India
Chapter keywords
Enzyme, isozymes, coenzyme, intracellular enzyme, extracellular enzyme, acid phosphatase, Creatine kinase, CK, aspartate amino transferase, AST, Gamma-glutamyl transpeptidase

Abstract

Enzymes are defined as the chemical reactions in all cells of living things operate in the presence of biological catalysts. An enzyme is a protein formed by the body that acts as a catalyst to cause a certain desired reaction. Enzymes are very specific. Each enzyme is designed to initiate a specific response with a specific result. This chapter covers the characteristics of enzymes, classifications of enzymes, functions of enzymes, mechanism of enzyme activity, factors affecting enzymes activity, isozymes, coenzymes, clinical important enzymes, and enzymes and disease conditions. Enzymes are biological compounds that increase the rate of a chemical reaction within the body. Almost all enzymes in the human body are proteins. All enzymes exhibit maximum activity under optimal conditions. Enzyme activity is markedly, affected by several factors. The important factors that influence the velocity of enzyme reaction are concentration of enzyme, concentration of substrate, effect of temperature, effect of pH, effect of product concentration, effect of activators, effect of time, and effect of light and radiation.

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