http://Opengenome.net/index.php?action=history&feed=atom&title=EnzymeEnzyme - Revision history2026-05-12T03:53:47ZRevision history for this page on the wikiMediaWiki 1.31.3http://Opengenome.net/index.php?title=Enzyme&diff=28454&oldid=prevWikiSysop at 03:51, 7 January 20082008-01-07T03:51:37Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 03:51, 7 January 2008</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><p>Like all catalysts, enzymes work by lowering the activation energy (<em>E</em><sub>a</sub> or &Delta;<em>G</em><sup>&Dagger;</sup>) for a reaction, thus dramatically accelerating the rate of the reaction. Most enzyme reaction rates are millions of times faster than those of comparable uncatalyzed reactions. As with all catalysts, enzymes are not consumed by the reactions they catalyze, nor do they alter the equilibrium of these reactions. However, enzymes do differ from most other catalysts by being much more specific. Enzymes are known to catalyze about 4,000 biochemical reactions.<sup class="reference" id="_ref-1">[2]</sup> Although almost all enzymes are proteins, not all biochemical catalysts are enzymes, since some RNA molecules called ribozymes also catalyze reactions.<sup class="reference" id="_ref-2">[3]</sup> Synthetic molecules called artificial enzymes also display enzyme-like catalysis.<sup class="reference" id="_ref-3">[4]</sup></p></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><p>Like all catalysts, enzymes work by lowering the activation energy (<em>E</em><sub>a</sub> or &Delta;<em>G</em><sup>&Dagger;</sup>) for a reaction, thus dramatically accelerating the rate of the reaction. Most enzyme reaction rates are millions of times faster than those of comparable uncatalyzed reactions. As with all catalysts, enzymes are not consumed by the reactions they catalyze, nor do they alter the equilibrium of these reactions. However, enzymes do differ from most other catalysts by being much more specific. Enzymes are known to catalyze about 4,000 biochemical reactions.<sup class="reference" id="_ref-1">[2]</sup> Although almost all enzymes are proteins, not all biochemical catalysts are enzymes, since some RNA molecules called ribozymes also catalyze reactions.<sup class="reference" id="_ref-2">[3]</sup> Synthetic molecules called artificial enzymes also display enzyme-like catalysis.<sup class="reference" id="_ref-3">[4]</sup></p></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><p>Enzyme activity can be affected by other molecules. Inhibitors are molecules that decrease enzyme activity; activators are molecules that increase activity. Many drugs and poisons are enzyme inhibitors. Activity is also affected by temperature, chemical environment (e.g. pH), and the concentration of substrate. Some enzymes are used commercially, for example, in the synthesis of antibiotics. In addition, some household products use enzymes to speed up biochemical reactions (<em>e.g.</em>, enzymes in biological washing powders break down protein or fat stains on clothes; enzymes in meat tenderizers break down proteins, making the meat easier to chew).</p></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><p>Enzyme activity can be affected by other molecules. Inhibitors are molecules that decrease enzyme activity; activators are molecules that increase activity. Many drugs and poisons are enzyme inhibitors. Activity is also affected by temperature, chemical environment (e.g. pH), and the concentration of substrate. Some enzymes are used commercially, for example, in the synthesis of antibiotics. In addition, some household products use enzymes to speed up biochemical reactions (<em>e.g.</em>, enzymes in biological washing powders break down protein or fat stains on clothes; enzymes in meat tenderizers break down proteins, making the meat easier to chew).</p></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><p>&nbsp;</p></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><p>&nbsp;</p></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><h2><span class="mw-headline">Etymology and history</span></h2></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><h2><span class="mw-headline">Etymology and history</span></h2></div></td></tr>
</table>WikiSysophttp://Opengenome.net/index.php?title=Enzyme&diff=28453&oldid=prevWikiSysop at 03:50, 7 January 20082008-01-07T03:50:41Z<p></p>
<a href="http://Opengenome.net/index.php?title=Enzyme&diff=28453&oldid=28452">Show changes</a>WikiSysophttp://Opengenome.net/index.php?title=Enzyme&diff=28452&oldid=prevWikiSysop at 03:50, 7 January 20082008-01-07T03:50:22Z<p></p>
<a href="http://Opengenome.net/index.php?title=Enzyme&diff=28452&oldid=4755">Show changes</a>WikiSysophttp://Opengenome.net/index.php?title=Enzyme&diff=4755&oldid=prevNmlee at 08:47, 6 February 20062006-02-06T08:47:52Z<p></p>
<p><b>New page</b></p><div><p>정의</p><br />
<ul><br />
<li>유기체가 화학적 반응을 할 때 촉매 작용을 하는 살아 있는 세포에서 생성되는 복합물.</li><br />
</ul></div>Nmlee