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Agarose gel electrophoresis of total RNA extracted from Chinese oak silkworm pupa, the synthesized double-strand cDNA (A), and the PCR products of insertion fragments from the clones selected randomly (B). Lane 1: total RNA. Lane 2: ds-cDNA. Lanes 3-14 show the PCR products of different clones. Lane M: marker (5 000, 3 000, 2 000, 1 000, 750, 500, 200, and 100 bp).
