Nucleic Acids Research, 1983, Vol. 11, No. 23 8495-8508
© 1983
MOLECULAR BIOLOGY |
A chicken repetitive DNA sequence that is highly sensitive to single-strand specific endonucleases
Department of Microbiology and Immunology, Washington University School of Medicine St. Louis, MO 63110, USA
Received August 18, 1983. Revised November 3, 1983. Accepted November 3, 1983.
A DNA sequence consisting of the 5-mer AGAGG repeated tandemly 32 times has been detected in a chicken genome clone and found to be present in about 2000 copies per chicken genome. This sequence was highly susceptible to single-strand specific endonucleases isolated from Aspergillus oryzae (S1) and mung bean, but cleavage by a single-strand specific endonuclease isolated from Neurospora crassa occurred only at a pH below 5.5. Endonucleolytic cutting of the AGAGG sequence by the single-strand specific enzymes required a supercoiled substrate and was independent of ionic strength.
*Present address: Department of Microbiology, University of Rochester Medical Center, Rochester, NY 14627, USA.
+Present address: Department of Medicine, St. Mary's Hospital, St. Louis, MO, USA.
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