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. 2009 Jun 3;4(6):e5778. doi: 10.1371/journal.pone.0005778

Figure 1. Mechanism of Tc element transposition, herpes recombination and V(D)J recombination suggests homologous adaptation of a primordial DDE recombinase.

Figure 1

Recombination sites of all of these DNA elements are adjacent to a sequence containing a sequence resembling the V(D)J heptamer (bold type) and nonamer sequences (underlined). Nonamer sequences are often spaced at 12 or 23 nucleotide intervals to facilitate DNA bending. Sequences shown from top to bottom: invertebrate Tc elements Tc1, Tc3, EBV terminal repeat sequences, herpes simplex recombination sites, V(D)J RSS and transib transposon termini (Tsib) most closely related to V(D)J RSS among tranposons.