<https://zh.coursera.org/lecture/epigenetics/3-6-stages-of-x-inactivation-initiation-and-spreading-of-silencing-NNgjH#lecture>
<http://schema.org/name>
"3.6 Stages of X inactivation - initiation and spreading of silencing"
<https://zh.coursera.org/lecture/epigenetics/3-6-stages-of-x-inactivation-initiation-and-spreading-of-silencing-NNgjH>