Topics: Organ Systems, Cells, Organelles, Microbiota, Organ Systems, Water, Acids, Bases, Buffers, H+ Concentration, Disorders of Protein Misfolding, Protein Structure, Precursor Proteins, active protein, Proteolysis, Protease Inhibitors, Protein Folding, Autophagy, Protein Misfolding, Fibrillogenic Diseases, Chemical Kinetics, Thermodynamics, Enzymes, Enzyme RegulationActive Site, Enzyme–Substrate Complex, Michaelis–Menten Model, Enzyme-Catalyzed Reactions, Irreversible Inhibition, Inhibition, Clinical Enzymology, Biomarkers of Tissue Injury, Tissue Injury, Serum, Plasma Markers, Tissue Damage, Simple Carbohydrates, Simple Carbohydrates, Heteropolysaccharides, Glycoconjugates, Glycoproteins, Glycolipids, Cell Membrane Constituents, Cell-Surface Glycoproteins, Serum Glycoproteins, Connective Tissue, Fibrous Protein, Nonfibrous Protein, Proteoglycan, Gastrointestinal Digestion, Gastrointestinal Absorption, Gastrointestinal Tract, Gastrointestinal Hormones, Carbohydrate Metabolism, Glycolysis, Tricarboxylic Acid Cycle, Glycolysis, Pyruvate Metabolism, Tricarboxylic Acid Cycle, Electron Transport Chain, Oxidative Phosphorylation, Oxygen-Consuming Systems, Mitochondrial Structure, Mitochondrial Genome, Respiratory Chain Expression, Mitochondrial Diseases, Gluconeogenesis, Glycogen Synthesis, glycogen Breakdown, Alternative Pathways, Hexose Interconversion, Amino Acid Metabolism, Metabolism of Ammonia, Lipid, fatty acid, Eicosanoid, Fatty Acid Oxidation, Unsaturated Fatty Acid, Trans-Fatty Acid, Essential Fatty Acid, Phospholipids, Glycosphingolipids, Cholesterol, Phosphatidylcholine, Phosphosphingolipid, Catabolism, Storage Disorders of Sphingolipids, Sphingolipids, Acetyl-Coa, Hmg-Coa, Plasma Lipoprotein, Contractile Systems, Muscle Systems, Nonmuscle Systems, Energy Metabolism, Obesity, Diabetes Mellitus, Chromosomes, Chromatin, DNA, Recombinant DNA Technology, DNA Replication, DNA Repair, DNA Mutation, Protein Synthesis, RNA, Messenger RNA, Prokaryotic Transcription, Genetic Code, tRNA Molecule, Ribosomes, Gene Expression, mRNA Synthesis, Gene Regulation, Nucleotide Metabolism