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pri-1 or pri-2 RNAi activate the PEK-1 branch in the embryos of C. elegans. a and b) The immunoblot depicts the levels of phospho-Ser51 eIF2α (P-eIF2α) and α-tubulin in EV, pri-1, or pri-2 RNAi-treated wild-type or pek-1 mutant worm embryos (n = 2–3, for additional repeats, please see Supplementary Fig. 2).
