inverse repeats of the transposon tn2660 in either a cole1 or an r6k replicon , with or without inversions of the parental dna sequences between the repeats , show no detectable ( less than 2 % ) evidence of recombination between the repeats after 60 generations of growth in either reca or reca+ hosts .
C0034865
recombination
C1419240
reca