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Recombination assay system. Two GFP genes having stop codons (GFPuv60* and GFPuv120*) were used for recombination templates. If recombination occurs between the two stop codons and the resultant gene does not contain stop codons, the gene recovers the fluorescence. The fluorescent gene is shown as white bars and non-fluorescent variants having stop codon(s) are shown as shaded bars.
