Fig. 6. Scheme of the recombination events in the Abd-Bpp region that were probably
the origin of class I (Abd-B m-) and class II
(iab-8,9) derivatives of Abd-Blac1. The different
DNA regions included in the P-element are marked as in
Fig. 1. We indicate in the
distal part of both derivatives the postulated 5' iab-8
domain.