Enzymes • Proteins • Act as catalysts to speed up chemical reactions • Are specific – each enzyme can carry out only one type of reaction. • Animation of Enzyme activity • http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_enzymes_work.html
Active Site = + Enzyme Substrate Enzyme-Substrate Complex + + Enzyme Products
Inhibitors • Slow down chemical reactions. • Competitive inhibitors compete with substrates for the active site • Allosteric inhibitors change the shape of the active site so the substrate can’t attach to the enzyme
Enzyme Competitive Inhibitor Substrate Inhibitor blocks active site stopping enzyme activity.
+ Allosteric Inhibitor Enzyme Active Site shape changed No connection