(a) The peptide bond (shaded blue) that binds amino acids together to form a polypeptide results from a condensation reaction that produces water. (b) Polypeptides are commonly shown as a string of balls in this textbook and elsewhere. Each ball represents an amino acid.
Products figure 3-9
O In the induced fit model of enzyme action, the enzyme can attach only to a substrate (reactant) with a specific shape. 0 The enzyme then changes and reduces the activation energy of the reaction so reactants can become products. G The enzyme is unchanged and is available to be used again.
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