Index to this page Enzymes Competitive inhibition Enzyme cofactors Lysozyme: a model of enzyme action Factors Affecting Enzyme Action Regulation of Enzyme Activity Anchoring enzymes in membranes Inactive precursors Feedback Inhibition Precursor Activation Regulation of Enzyme Synthesis Enzymes Enzymes are catalysts. Most are proteins. (A few ribonucleoprotein enzymes have been discovered and, for ...