T4 UvsX DNA recombinase mediates DNA strand exchange between homologous chromosomes. The protein forms a right-handed nucleoprotein complex on single ssDNA called the presynaptic filament that can search for homology in duplex DNA and pair the recombining DNA molecules to form a DNA joint molecule. This process is aided by ssDNA binding proteins and recombination mediators. The filament is then elongated by DNA polymerase with the newly synthesised strand displacing the old strand. The newly synthesised duplex DNA can then act as a template for the next cycle to achieve exponential amplification of dsDNA. E.coli cells expressing recombinant T4 UvsX gene.

• UvsX DNA recombinase is free from detectable nuclease contamination