tokens: Comparison of the sequences of attP , attB and bacteria-prophage junctions attL and attR showed a 26 bp common core sequence , where recombination takes place , near the 5 ' end of the integrase gene .
folded_tokens: comparison of the sequence of attp , attb and bacteria-prophage junction attl and attr show a 26 bp common core sequence , where recombination take place , near the 5 ' end of the integrase gene .