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Nucleic Acids Research, 1987, Vol. 15, No. 10 4035-4048
© 1987

Articles

A novel GC-rich dispersed repeat sequence in Drosophila melanogaster

Andrew J. Flavell1,*, Julian Dyson2 and David Ish-Horowicz3

1Department of Biochemistry, The University Dundee DD1 4HN 2Department of Genetics, Cambridge University Downing Street, Cambridge 3Imperial Cancer Research Fund, Developmental Biology Unit, Department of Zoology, Oxford University South Parks Road, Oxford 0X1 3PS, UK

*To whom correspondence should be addressed

Received February 23, 1987. Revised April 23, 1987. A novel family of dispersed repeat sequences from Drosophila melanogaster is described. Sequence analysis of two members of this family show them to contain greater than 75% GC bases. These are comprised of multiple repeats of GGX triplets interspersed occasionally with CGPy and TTPy. Southern blotting shows that these repeats are not transposable elements. Twenty four homologous recombinants have been localised by in situ hybridization to seven sites in the Drosophila genome. Polyadenylated RNAs homologous to this repeat family are expressed in a complex pattern which is developmentally regulated. We suggest that this family encodes a set of glycine-rich domains in Drosophila proteins.


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