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Mutagenesis vol. 12 no. 2 pp. 55-59, 1997
© 1997 UK Environmental Mutagen Society/Oxford University Press

research-article

Detection of chromosome 2 and chromosome 7 within X-ray-or colchicine-induced micronuclei by fluorescence in situ hybridization

K. Wuttke, C. Streffer and W.-U. Muller1

Institut für Medizinische Strahlenbiologie, Universitätsklinikum Essen, D45122 Essen, Germany

The occurrence of chromosome 2 and chromosome 7 within micronuclei of binucleated lymphocytes induced by X-rays or colchicine was scored using the whole chromosome painting technique. The observed frequency of involvement in micronucleus formation was compared with the yield that would be expected theoretically, when the random participation of each chromosome is assumed. No difference was observed between the expected and observed inclusion of chromosome 2 or chromosome 7 into micronuclei after X-ray exposure (2.5 Gy). This was also the case for chromosome 2, but not for chromosome 7 after colchicine treatment (0.04/0.06 µg/ml); chromosome 7 was detected approximately 1.5 times more frequently in micronucleus formation than would be expected from the assumption of a random distribution.

1To whom correspondence should be addressed


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