we have developed an effective method to delete or invert a chromosomal segment and to create reciprocal recombination between two nonhomologous chromosomes in saccharomyces cerevisiae , using the site-specific recombination system of psr1 , a circular cryptic dna plasmid resembling 2 microns dna of s. cerevisiae but originating from another yeast , zygosaccharomyces rouxii .
C0012925
circular
C0012854
dna