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Zygotic amplification of sense piRNAs by maternal antisense piRNAs. (A) Relative expressions of a set of piRNAs whose sense piRNA increase was most drastic. (B) Density plot of 0-, 6-, 12-, and 24-hpf piRNAs derived from Pao. Representative ping-pong site was enlarged. Plots were generated by base calling method. (C) Sense strand specific RT-PCR for Pao, Yamato, Bm1modoki, Benibana, and Kaede. (D) Model depicting zygotic piRNA amplification by maternal piRNAs in the silkworm.
