Unlike the signature peak ERVL transcript level at two-cell stage, B1 transcript level showed an increasing trend from zygote to blastocyst stage while another transposable element, ERV1, did not show major upregulation during preimplantation development (Supplementary Fig. 6h ).
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Nuclear receptor-SINE B1 network modulates expanded pluripotency in blastoids and blastocysts.
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