TEXTBOOK OF BIOCHEMISTRY

Welcome to Introduction to Biochemistry and Clinical Chemistry. This textbook has been meticulously designed to bridge the gap between fundamental biochemical principles and their
practical applications in clinical diagnostics. Biochemistry is the language of life, and clinical chemistry is the diagnostic lens through which we observe its systemic harmony- or disruptions. By integrating molecular pathways with organ-specific functional tests, this text provides a comprehensive foundation for students and professionals in the biomedical & healthcare sciences. The textbook opens with the structural organization of the cell, membrane transport, and the fundamental principles of thermodynamics, bioenergetics, & metabolic variations across different physiological states. It then transitions into a deep dive regarding enzymology, looking closely at enzyme kinetics, inhibition, regulation, and the crucial diagnostic and therapeutic roles of isoenzymes. Detailed pathways governing carbohydrates, lipids, proteins, and nucleic acids are explored extensively, explicitly connecting biochemical processes to real-world metabolic disorders such as diabetes mellitus, atherosclerosis, and gout. Furthermore, an examination of biological oxidation, the electron transport chain (ETC), and oxidative phosphorylation highlights the crucial mechanisms of cellular energy capture and mitochondrial function. Moving from the molecular framework to clinical environments, the textbook introduces the foundational role of the clinical laboratory, moving into advanced diagnostic modalities including immune chemical techniques like RIA and ELISA. Dedicated sections follow to cover organ-specific diagnostic panels, including Comprehensive Kidney Function Tests (KFTs), Liver Function Tests (LFTs), Lipid Profiles, and Fluid/Electrolyte balance. The book concludes with a vital exploration of the essential biochemical functions of vitamins and minerals alongside their associated deficiency diseases. Rather than presenting metabolic pathways in isolation, every chapter emphasizes monitoring organ specific and systemic disorders through precise biochemical parameters. Complex metabolic pathways, diagnostic techniques (such as clearance tests, RIA, & ELISA), and clinical interpretations are organized clearly for ease of studying and rapid review. Practical guidance is provided on interpreting laboratory markers-ranging from serum bilirubin and non-protein nitrogen (NPN) constituents to lipid fractions and electrolyte distributions. Whether you are navigating the intricate mechanisms of the central dogma, investigating cellular respiration, or evaluating a patient’s renal and hepatic profiles, this text serves as a reliable, highly integrated companion for your academic and clinical journey.

– Authors