Heme is an iron-containing prosthetic group essential for oxygen transport, electron transfer, cellular respiration, and the catalytic activity of many important enzymes.
Coenzyme A is a vitamin B5-derived coenzyme that carries acyl groups and plays essential roles in acetyl-CoA formation, cellular respiration, fatty acid metabolism, and biosynthesis.
FAD and FMN are vitamin B2-derived flavin coenzymes essential for electron transfer, cellular respiration, fatty acid oxidation, antioxidant defense, and metabolic reactions.
NAD⁺ and NADH are essential coenzymes that transfer electrons during metabolism. Learn their structure, functions, roles in cellular respiration, ATP production, redox reactions, and biological regulation.
Metal ions act as essential enzyme cofactors by stabilizing charges, activating molecules, transferring electrons, and supporting catalysis. Learn about major metal cofactors and their biological roles.
Many vitamins serve as precursors of essential coenzymes. Learn how B vitamins produce TPP, FAD, NAD+, coenzyme A, PLP, THF, and other coenzymes involved in metabolism.
Apoenzymes and holoenzymes explain how cofactors contribute to enzyme activity. Learn their definitions, differences, examples, functions, and importance in metabolism.
Prosthetic groups are tightly bound non-protein components required by many proteins and enzymes. Learn about heme, flavin, iron-sulfur groups, their functions, and biological importance.
Coenzymes are organic molecules that help enzymes perform biochemical reactions. Learn about their types, functions, vitamin-derived coenzymes, electron carriers, and importance in metabolism.
Cofactors are essential non-protein components that help enzymes perform biochemical reactions. Learn about inorganic and organic cofactors, their functions, examples, and importance in metabolism.
Allosteric enzymes regulate biochemical pathways by responding to molecules that bind at regulatory sites. Learn about allosteric activation, inhibition, cooperativity, feedback regulation, and metabolic control.
Competitive, noncompetitive, and uncompetitive inhibition are important types of enzyme inhibition. Learn how each inhibitor affects enzyme activity, Km, Vmax, substrate binding, and enzyme kinetics.
Learn about the major factors affecting enzyme activity, including temperature, pH, substrate concentration, enzyme concentration, inhibitors, activators, and cofactors. Understand how these factors influence enzyme-catalyzed reactions.
The induced-fit model explains how enzymes change shape when substrates bind, allowing precise substrate recognition and efficient catalysis. Learn how conformational changes influence enzyme activity.
The lock-and-key model explains how enzymes recognize specific substrates through complementary shapes and chemical properties. Learn how active sites, substrate specificity, and enzyme-substrate complexes work.
