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Enrichment of 'all or nothing' differentially expressed φx174 DNA HaeIII by SSH PCR. Various amount of φx174 HaeIII DNA was added in tester. None was added in driver. SSH PCR was carried out as described in Materials and Methods. Lane 1, φx174 HaeIII DNA marker; lane 2, 1.0% of φx174 DNA HaeIII in tester; lane 3, 0.1% of φx174 DNA HaeIII in tester; lane 4, 0.01% of φx174 HaeIII DNA in tester; lane 5, 0.001% of φx174 HaeIII DNA in tester; lane 5, 0.0001% of φx174 DNA HaeIII in tester.
