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. 2021 Jun 25;4:788. doi: 10.1038/s42003-021-02290-z

Fig. 7. Working model of the role of p38-MAPK in regulating protein translation to prime PrE differentiation during preimplantation-stage blastocyst maturation.

Fig. 7

During the period of blastocyst maturation (E3.5 to E4.5), p38-MAPKs, potentially acting via MYBBP1A, enable pre-rRNA processing and regulates global translational and co-transcriptional events, which is necessary for normal development and PrE specification. p38-MAPKs appear to be acting upstream of mTOR, towards a pathway supporting PrE survival in the maturing blastocyst.