it was found that the presence of the mutations in genes pola or reca decreased significantly the recombination frequency of phage amber mutant in the gene 43 ( dna polymerase ) , increased it in the case of amber mutation in the gene 46 ( exonuclease ) and had no effect on the recombination of amber mutants in genes 30 , 32 , 33 , 41 , 42 , 45 , 44 , 52 .
C1419240
reca
C0034865
recombination