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	<id>https://teaching.ncl.ac.uk/bms/wiki//index.php?action=history&amp;feed=atom&amp;title=Facultative_heterochromatin</id>
	<title>Facultative heterochromatin - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://teaching.ncl.ac.uk/bms/wiki//index.php?action=history&amp;feed=atom&amp;title=Facultative_heterochromatin"/>
	<link rel="alternate" type="text/html" href="https://teaching.ncl.ac.uk/bms/wiki//index.php?title=Facultative_heterochromatin&amp;action=history"/>
	<updated>2026-04-10T16:44:21Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://teaching.ncl.ac.uk/bms/wiki//index.php?title=Facultative_heterochromatin&amp;diff=19457&amp;oldid=prev</id>
		<title>Nnjm2: Removed some stray code.</title>
		<link rel="alternate" type="text/html" href="https://teaching.ncl.ac.uk/bms/wiki//index.php?title=Facultative_heterochromatin&amp;diff=19457&amp;oldid=prev"/>
		<updated>2017-12-04T20:16:38Z</updated>

		<summary type="html">&lt;p&gt;Removed some stray code.&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 20:16, 4 December 2017&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
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&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;amp;nbsp;&lt;/del&gt;Facultative [[Heterochromatin|heterochromatin]]&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;amp;nbsp;&lt;/del&gt;is&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;amp;nbsp;&lt;/del&gt;formed during development and is often the condensation of regions which contain [[Coding genes|coding genes]]. An example of facultative heterochromatin is the formation of [[Barr bodies|Barr bodies]] (inactivated [[X chromosomes|X chromosomes]]), which occurs during [[Cell division|cell division&amp;lt;ref&amp;gt;BioMed Central, Saksouk N, Simboeck E, Déjardin J, Constitutive heterochromatin formation and transcription in mammals. 15th January 2015 [cited:03/12/2017]; Available from: https://epigeneticsandchromatin.biomedcentral.com/articles/10.1186/1756-8935-8-3&amp;lt;/ref&amp;gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;]]&lt;/del&gt;.&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;amp;nbsp;&lt;/del&gt;The silencing of genes in facultative heterochromatin may be reversed, but if the [[&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Phenotype&lt;/del&gt;|phenotype &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;of&lt;/del&gt;]] the organism is stable then this process is unlikely&amp;lt;ref name=&quot;Epigenetics by L. Armstrong&quot;&amp;gt;Armstrong L, Epigenetics. 1st Edition, New York: Garland Science. 2014&amp;lt;/ref&amp;gt;.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Facultative [[Heterochromatin|heterochromatin]] is formed during development and is often the condensation of regions which contain [[Coding genes|coding genes]]. An example of facultative heterochromatin is the formation of [[Barr bodies|Barr bodies]] (inactivated [[X chromosomes|X chromosomes]]), which occurs during [[Cell division|cell division&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;]]&lt;/ins&gt;&amp;lt;ref&amp;gt;BioMed Central, Saksouk N, Simboeck E, Déjardin J, Constitutive heterochromatin formation and transcription in mammals. 15th January 2015 [cited:03/12/2017]; Available from: https://epigeneticsandchromatin.biomedcentral.com/articles/10.1186/1756-8935-8-3&amp;lt;/ref&amp;gt;. The silencing of genes in facultative heterochromatin may be reversed, but if the [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;phenotype&lt;/ins&gt;|phenotype]] &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;of &lt;/ins&gt;the organism is stable then this process is unlikely&amp;lt;ref name=&quot;Epigenetics by L. Armstrong&quot;&amp;gt;Armstrong L, Epigenetics. 1st Edition, New York: Garland Science. 2014&amp;lt;/ref&amp;gt;.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; 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;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; 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;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; 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;&quot;&gt;&lt;div&gt;=== References:  ===&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; 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;&quot;&gt;&lt;div&gt;=== References:  ===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
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&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; 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;&quot;&gt;&lt;div&gt;&amp;lt;references /&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; 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;&quot;&gt;&lt;div&gt;&amp;lt;references /&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Nnjm2</name></author>
	</entry>
	<entry>
		<id>https://teaching.ncl.ac.uk/bms/wiki//index.php?title=Facultative_heterochromatin&amp;diff=19060&amp;oldid=prev</id>
		<title>170094052 at 17:20, 3 December 2017</title>
		<link rel="alternate" type="text/html" href="https://teaching.ncl.ac.uk/bms/wiki//index.php?title=Facultative_heterochromatin&amp;diff=19060&amp;oldid=prev"/>
		<updated>2017-12-03T17:20:53Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 17:20, 3 December 2017&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
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&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;amp;nbsp;Facultative [[Heterochromatin|heterochromatin &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;is&lt;/del&gt;]] formed during development and is often the condensation of regions which contain [[Coding genes|coding genes]]. An example of facultative heterochromatin is the formation of [[Barr bodies|Barr bodies]] (inactivated [[X chromosomes|X chromosomes]]), which occurs during [[Cell division|cell division&amp;lt;ref&amp;gt;BioMed Central, Saksouk N, Simboeck E, Déjardin J, Constitutive heterochromatin formation and transcription in mammals. 15th January 2015 [cited:03/12/2017]; Available from: https://epigeneticsandchromatin.biomedcentral.com/articles/10.1186/1756-8935-8-3&amp;lt;/ref&amp;gt;]]. The silencing of genes in facultative heterochromatin may be reversed, but if the [[Phenotype|phenotype of]] the organism is stable then this process is unlikely&amp;lt;ref name=&quot;Epigenetics by L. Armstrong&quot;&amp;gt;Armstrong L, Epigenetics. 1st Edition, New York: Garland Science. 2014&amp;lt;/ref&amp;gt;.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;amp;nbsp;Facultative [[Heterochromatin|heterochromatin]]&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;amp;nbsp;is&amp;amp;nbsp;&lt;/ins&gt;formed during development and is often the condensation of regions which contain [[Coding genes|coding genes]]. An example of facultative heterochromatin is the formation of [[Barr bodies|Barr bodies]] (inactivated [[X chromosomes|X chromosomes]]), which occurs during [[Cell division|cell division&amp;lt;ref&amp;gt;BioMed Central, Saksouk N, Simboeck E, Déjardin J, Constitutive heterochromatin formation and transcription in mammals. 15th January 2015 [cited:03/12/2017]; Available from: https://epigeneticsandchromatin.biomedcentral.com/articles/10.1186/1756-8935-8-3&amp;lt;/ref&amp;gt;]].&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;amp;nbsp;&lt;/ins&gt;The silencing of genes in facultative heterochromatin may be reversed, but if the [[Phenotype|phenotype of]] the organism is stable then this process is unlikely&amp;lt;ref name=&quot;Epigenetics by L. Armstrong&quot;&amp;gt;Armstrong L, Epigenetics. 1st Edition, New York: Garland Science. 2014&amp;lt;/ref&amp;gt;.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; 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;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; 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;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; 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;&quot;&gt;&lt;div&gt;=== References:  ===&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; 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;&quot;&gt;&lt;div&gt;=== References:  ===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; 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;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; 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;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
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&lt;/table&gt;</summary>
		<author><name>170094052</name></author>
	</entry>
	<entry>
		<id>https://teaching.ncl.ac.uk/bms/wiki//index.php?title=Facultative_heterochromatin&amp;diff=19058&amp;oldid=prev</id>
		<title>170094052: Created page with &quot;&amp;nbsp;Facultative heterochromatin is formed during development and is often the condensation of regions which contain coding genes. An exampl...&quot;</title>
		<link rel="alternate" type="text/html" href="https://teaching.ncl.ac.uk/bms/wiki//index.php?title=Facultative_heterochromatin&amp;diff=19058&amp;oldid=prev"/>
		<updated>2017-12-03T17:17:49Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot; Facultative &lt;a href=&quot;/bms/wiki/index.php/Heterochromatin&quot; title=&quot;Heterochromatin&quot;&gt;heterochromatin is&lt;/a&gt; formed during development and is often the condensation of regions which contain &lt;a href=&quot;/bms/wiki/index.php/Coding_genes&quot; title=&quot;Coding genes&quot;&gt;coding genes&lt;/a&gt;. An exampl...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;amp;nbsp;Facultative [[Heterochromatin|heterochromatin is]] formed during development and is often the condensation of regions which contain [[Coding genes|coding genes]]. An example of facultative heterochromatin is the formation of [[Barr bodies|Barr bodies]] (inactivated [[X chromosomes|X chromosomes]]), which occurs during [[Cell division|cell division&amp;lt;ref&amp;gt;BioMed Central, Saksouk N, Simboeck E, Déjardin J, Constitutive heterochromatin formation and transcription in mammals. 15th January 2015 [cited:03/12/2017]; Available from: https://epigeneticsandchromatin.biomedcentral.com/articles/10.1186/1756-8935-8-3&amp;lt;/ref&amp;gt;]]. The silencing of genes in facultative heterochromatin may be reversed, but if the [[Phenotype|phenotype of]] the organism is stable then this process is unlikely&amp;lt;ref name=&amp;quot;Epigenetics by L. Armstrong&amp;quot;&amp;gt;Armstrong L, Epigenetics. 1st Edition, New York: Garland Science. 2014&amp;lt;/ref&amp;gt;. &lt;br /&gt;
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		<author><name>170094052</name></author>
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