FIG. 5.

Categories of nonhomologous recombination products. (A) Forced copy choice nonhomologous recombination product. DNA synthesized to the 5′ end of the donor template transfers to an acceptor template position with primer terminal microidentity. (B) Premature jump. DNA synthesis transfers from the donor to the acceptor template before reaching the 5′ end of the donor template. (C) Incorporation of tertiary template sequences. Nascent DNA transfers from the donor template to a tertiary template before subsequent transfer to the acceptor template. Illustrated here, the tertiary template used is a segment of polyadenylation signal readthrough RNA. Acceptor region abbreviations are given in the legend to Fig. 1.