An unusual pairing of homologous X chromosomes occurs during X inactivation. A new study in mouse embryonic stem cells shows that telomeres and the telomeric RNA PAR-TERRA are responsible for additional pairwise interactions that guide Xic–Xic pairing.

中文翻译：

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X灭活中染色体配对的染色质相互作用的四倍

X灭活过程中，发生了不寻常的同源X染色体配对。对小鼠胚胎干细胞的一项新研究表明，端粒和端粒RNA PAR-TERRA负责指导Xic-Xic配对的其他成对相互作用。