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Three predicted putative autonomous elements in the silkworm based on protein domain. (A) A schematic representation of the putative autonomous Helitrons; Rep, rolling circle replication initiator motif; Helicase, region similar to SF1 superfamily of DNA helicases. (B) Alignment of REP motifs between silkworm and 12 other species. (C) Alignment of eight conserved motifs of the SF1 superfamily of DNA helicases.
