Kato AC, Borstad L, Fraser MJ, Denhardt DT. Isolation of repeated and self-complementary sequences from E. coli DNA.
Nucleic Acids Res 1974;
1:1539-48. [PMID:
10793709 PMCID:
PMC343430 DOI:
10.1093/nar/1.11.1539]
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Abstract
We have used the single-strand specific nuclease from Neurospora crassa and chromatography on methylated albumin-kieselguhr to purify and characterize repeated and self-complementary sequences from Escherichia coli DNA. Approximately 0.5% of the genome renatures spontaneously at zero time and another 2% renatures somewhat more rapidly than the total DNA. The early renaturing DNA has a base composition and a Tm similar to the total DNA and contains on the average 100 base pairs; the self-complementary DNA also has a base composition like E. coli but contains a mean of 170 base pairs. No evidence was obtained for the presence of a highly redundant sequence.
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