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		<title>Thread:Cholesterol to 7 dehydrocholesterol (2) - Revision history</title>
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		<updated>2026-06-20T19:56:06Z</updated>
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		<id>https://oldclassic.wikipathways.org/index.php?title=Thread:Cholesterol_to_7_dehydrocholesterol_%282%29&amp;diff=92340&amp;oldid=prev</id>
		<title>AlexanderPico: New page: Hi SuEs.  Well, the enzyme that performs the forward reaction, DHCR7, is technically capable of preforming the reverse reaction (http://enzyme.expasy.org/EC/1.3.1.21), but not under physio...</title>
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				<updated>2017-05-25T22:34:21Z</updated>
		
		<summary type="html">&lt;p&gt;New page: Hi SuEs.  Well, the enzyme that performs the forward reaction, DHCR7, is technically capable of preforming the reverse reaction (http://enzyme.expasy.org/EC/1.3.1.21), but not under physio...&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;Hi SuEs.  Well, the enzyme that performs the forward reaction, DHCR7, is technically capable of preforming the reverse reaction (http://enzyme.expasy.org/EC/1.3.1.21), but not under physiological conditions where [NADPH] out numbers [NADP+] by at least 100:1 (http://www.biochemj.org/content/115/4/609).  There is literature on the downregulation of DHCR7 in response to high levels of cholesterol, leading to increased vitamin D production (http://www.jbc.org/content/291/16/8363.full.pdf), but I also can't find anything about biological reactions that convert cholesterol back into 7DHC.  &lt;br /&gt;
[[User:AlexanderPico|AlexanderPico]] 22:34, 25 May 2017 (UTC)&lt;/div&gt;</summary>
		<author><name>AlexanderPico</name></author>	</entry>

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