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Nested PCR assays for (A and B) LINE-like or (C) gypsy-like RTases, and (D) mariner-like transposases. Twenty additional cycles of second-step amplification were done for B. Brackets indicate expected size ranges. Lane numbers correspond to species numbers in Table 1. Bdelloid rotifers are underlined. E, Escherichia coli; S, Saccharomyces cerevisiae.
