Polypeptide Mutagenesis Method


There is provided a method for altering the amino acid sequence of a target polypeptide by altering a target DNA sequence which encodes that polypeptide, the method comprising the step of introducing a transposon into the target DNA sequence, in which the transposon comprises a first restriction enzyme recognition sequence towards each of its termini, the recognition sequence not being present in the remainder of the transposon, or in the target DNA sequence, or in a construct comprising the target DNA sequence, the first restriction enzyme recognition sequence being recognised by a first restriction enzyme which is an outside cutter and being positioned such that the first restriction enzyme has a DNA cleavage site positioned beyond the end of the terminus of the transposon.


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