Mexican redbud (Cercis canadensis ssp. Mexicana) trees have a rounded and dense form that is broad and compact. The stems on Mexican redbuds are thicker than other redbud species, as well as more rigid. They grow 15 to 25 feet tall and have pink to purple spring-blooming flowers. The dark-green, leather-like leaves on Mexican redbud trees grow 2 to 6 inches long and have a glossy appearance as the tree ages.
enzymeâsubstrate complex. A Dictionary of Biology. Â© A Dictionary of Biology 2004, originally published by Oxford University Press 2004. enzymeâsubstrate complex The intermediate formed when a substrate molecule interacts with the active site of an enzyme. Following the formation of an enzymeâsubstrate complex, the substrate molecule undergoes a chemical reaction and is converted into a new product.
Enzymes are structured so that they bond to a second, specific molecule, called a substrate. When the enzyme and its substrate come together, at a place on the enzyme called the active site, the substrate is modified, for example by combining two different substrate molecules into a single molecule.oun. 1. enzyme-any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions. active site-the part of an enzyme or antibody where the chemical reaction occurs.