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Microphotometric scanning of chromatid gaps and breaks induced by AluI and BamHI in Chinese hamster ovary cells Braz. J. Genet.
Martínez-López,Wilner; Bonomi,Rossana; Folle,Gustavo A.; Drets,Máximo E..
Chromatid gaps and breaks induced by the restriction endonucleases AluI and BamHI in the long arm of chromosome 1 of Chinese hamster ovary cells were microphotometrically scanned and mapped to a quantitative G-band map. More than 50% of chromatid breaks appeared as chromatin losses of greater than 5% of the total arm length. The majority of chromatid gaps and breaks as well as chromatin losses induced by both restriction endonucleases were non-randomly located in a region from 0.35 to 0.65 relative length units of the long arm of chromosome 1. We suggest that the access of these endonucleases to chromosomal DNA depends on the local organization of the chromatin.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microphotometric scanning; Chromatid gaps; AluI; BamHI; Chinese hamster; Ovary cells.
Ano: 1996 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551996000400007
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