The K. fragilis CBS 397 gene library was screened with a GAP probe, which was designed according to the homology with S. cerevisiae, K. lactis, K. marxianus GAP gene. One positive clone pG1 containing GAP1 gene was isolated and confirmed by Southern hybridization. The GAP1 gene was partially sequenced. By using a fragment of the clone as a probe, another positive clone pG2 was acquired and also confirmed by Southern hybridization. The GAP2 gene from pG2 was completely sequenced. The upstream sequences of both genes were shown to have promoter activity. The fragment of pG1 could hybridize with three chromosomes of K. fragilis.
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