the instability of orf-1 shows the participation of is3 elements ( alpha 1 beta 3 and alpha 3 beta 1 ) in the reca , recf-dependent recombinational decay and allows localization of two active sites on the chromosome : fre i1 between pure and tsx markers and fre i2 between tsx and proc .
C1419240
reca
C0034865
recombinational