Modern molecular biology has revolutionized our understanding of enzymology. Through , scientists can:
Their activity can be switched on or off, allowing the cell to respond to environmental changes. 2. Molecular Architecture and the Active Site
The addition or removal of chemical groups (like phosphorylation) acts as a molecular "toggle switch."
Molecules bind to sites other than the active site, causing a structural change that either activates or inhibits the enzyme.
Specific residues within the active site participate directly in the making and breaking of chemical bonds.
The cell sequesters specific enzymes within organelles (like lysosomes or mitochondria) to prevent unwanted reactions and increase efficiency. 5. Molecular Biology and Enzyme Engineering