Occurrence of 9 homologous repeat units in the external spacer region of a nuclear maize rRNA gene unit
- 1 January 1986
- journal article
- research article
- Published by Oxford University Press (OUP) in Nucleic Acids Research
- Vol. 14 (12) , 4969-4986
- https://doi.org/10.1093/nar/14.12.4969
Abstract
A 14 kb maize DNA fragment carrying nuclear rRNA genes and spacer regions was isolated and characterised by restriction enzyme mapping. A complete 3020 bp long external spacer region was sequenced and revealed 9 tandemly arranged 200 bp long repeat units with high homology. The repeat units lie upstream from two prominent S1 mapping signals. The sequence of a typical repeat unit is compared to a corresponding 130 bp long wheat repeat unit. The possible functional relevance of the repeat units is discussed.Keywords
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