Active site活性中心 Active site活性中心： Catalysis takes place at a particular site on the enzyme. By untilizing the full repertoire of intermolecular forces 分子间作用力，enzymes bring substrates together in an optimal orientation定位，the prelude to making and breaking chemical bonds.They catalyze reactions by stabilizing transition states过渡态，the highest-.energy species高能物质in reaction pathways. By selectively stabilizing a transition state,an enzyme determines which one of several potential chemical reactions actually takes place.Active site 活性中心： Catalysis takes place at a particular site on the enzyme. By untilizing the full repertoire of intermolecular forces 分子间作用力, enzymes bring substrates together in an optimal orientation定位, the prelude to making and breaking chemical bonds. They catalyze reactions by stabilizing transition states过渡态, the highest-energy species高能物质 in reaction pathways. By selectively stabilizing a transition state, an enzyme determines which one of several potential chemical reactions actually takes place. Active site 活性中心