1887

Abstract

Four highly amplified DNA sequences (ADS) ranging from 5·8 to 24·8 kb were found in spontaneous mutant strains of DSM 40697. Restriction patterns of total DNA were hybridized with purified ADS6 (24·8 kb) as a probe to detect the amplifiable regions in the wild-type (WT) genome. The results suggested that the amplifiable unit of DNA (AUD) was present as a single copy in the WT genome. Moreover, similarities suggested by the restriction maps of three of the ADS were confirmed by hybridization experiments. The fourth ADS did not hybridize with the three others. Therefore, two families of DNA sequences are potentially amplifiable in the genome.

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1988-07-01
2021-05-15
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