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. 1986 Jun;83(11):3664–3668. doi: 10.1073/pnas.83.11.3664

Isolation and characterization of the gene encoding Drosophila DNA topoisomerase II.

J M Nolan, M P Lee, E Wyckoff, T S Hsieh
PMCID: PMC323583  PMID: 3012525

Abstract

We have isolated the gene coding for the Drosophila type II DNA topoisomerase by immunochemically screening a Drosophila cDNA library constructed with a phage lambda expression vector, lambda gt11. The identity of the cloned gene is confirmed by the analysis of an antigenic fusion protein produced in Escherichia coli and by the in vitro translation of its RNA. The gene is 5.1 kilobases in length, the expected size for a gene encoding topoisomerase II (Mr 170,000), and it is divided into five exons. By in situ hybridization to the polytene chromosomes from salivary glands, we have mapped it to chromosome 2L at 37D.

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