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		<title>Scientists Map the Earliest Steps of Polycomb Gene Silencing in Human Embryos</title>
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				<category><![CDATA[Biology]]></category>
		<category><![CDATA[blastocyst]]></category>
		<category><![CDATA[DNA Methylation]]></category>
		<category><![CDATA[embryonic stem cells]]></category>
		<category><![CDATA[epigenetics]]></category>
		<category><![CDATA[H2AK119ub]]></category>
		<category><![CDATA[H3K27me3]]></category>
		<category><![CDATA[histone modification]]></category>
		<category><![CDATA[human embryos]]></category>
		<category><![CDATA[Polycomb]]></category>
		<category><![CDATA[PRC1]]></category>
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		<category><![CDATA[Stacc-seq]]></category>
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					<description><![CDATA[A Nature Genetics study shows that the histone mark H2Aub laid down by PRC1 guides the reestablishment of Polycomb repression, including H3K27me3, during the earliest stages of human embryonic development.]]></description>
		
		
		
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