Subject matter and methods of comparative biochemistry --Nucleic acids and nuclear proteins. - Structural variety and metabolism of proteins. - Molecular evolution. - Plasma proteins, yolk proteins and metal-binding proteins. - Immunoproteins. - Respiratory pigments. - Peptide hormones. - Toxic proteins and peptides. - Proteins of muscle and the cytoskeleton --Extracellular structural and secretory proteins. - Small nitrogenous compounds. - Structure and metabolism of carbohydrates. - Glycolysis. - Lipids. - Sterols and steroids. - Ester hydrolases, ATPases and carboanhydrases. - Oxidative metabolism. - Secondary metabolites