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. 2017 Jul 19;16(15):1440–1452. doi: 10.1080/15384101.2017.1338985

Figure 6.

Figure 6.

ARPP19 phosphorylation at S109 does not impair meiosis resumption triggered by S67-phosphorylated ARPP and the subsequent inhibition of PP2A-B55δ. A. Prophase-arrested oocytes were injected or not with 150 ng or 300 ng of S67A-S109D-ARPP and then stimulated either with progesterone (Pg) or by injecting S67-thiophosphorylated S109A-ARPP (pS67-S109A-ARPP, 150 ng per oocyte). Meiosis resumption was followed by scoring the % of GVBD 18 hours after hormonal stimulation or pS67-S109A-ARPP injection. B. Cdk1 activation was analyzed in oocytes from panel (A) by western blotting Gwl, S287-phosphorylated Cdc25 (pS287-Cdc25), phosphorylated MAPK (pMAPK) and Y15-phosphorylated Cdk1 (pY15-Cdk1).