Nucleic Acids Research, 1989, Vol. 17, No. 12 4699-4712
© 1989
MOLECULAR BIOLOGY |
The 5S RNA gene minichromosome of Euplotes
U.T.-Oak Ridge Graduate School of Biomedical Sciences, Biology Division, Oak Ridge National Laboratory Box 2009, Oak Ridge, TN 378318077 1Laboratory of Molecular Biology, NIDDK, National Institutes of Health Bethesda, MD 20892, USA
Received December 30, 1988. Revised May 18, 1989. Accepted May 18, 1989.
The macronucleus of the ciliated protozoan Euplotes eurystomus contains about 106 copies of a single type of 5S ribosomal RNA gene. This 5S gene DNA is only 930 bp long, is flanked by telomeres, and contains a single coding region of 120 bp which serves as a template for transcription in vivo and in vitro. The 5S gene minichromatin possesses four positioned nucleosomes and hypersensitive cleavage sites in the telomeric regions.
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