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Nucleic Acids Research, 1987, Vol. 15, No. 4 1717-1728
© 1987

Articles

Telomeric site position heterogeneity in macronuclear DNA of Paramecium primaurelia

Anne Baroin1, Annik Prat and François Caron*

Centre de Génétique Moléculaire CNRS, 91190 Gif sur Yvette, France

*To whom correspondence should be addressed

Received December 31, 1986. Accepted January 23, 1987.

In Paramecium primaurelia, the macronuclear gene encoding the G surface protein is located near a telomere. In this study, multiple copies of this telomere have been isolated and the subtelomeric and telomeric regions of some of them have been sequenced. The telomeric sequences consist of tandem repeats of the hexanucleotides C4A2 or C3A3. We show that the location where these repeats are added, which we call the telomeric site, is variable within a 0.6–0.8-kb region. These results are discussed in relation with the formation of macronuclear DNA.

1Present address: Laboratoire de Biologic Cellulaire, Bâitiment 444, 91405 Orsay Cedex, France


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