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. 1998 Jun;6(4):329-32.
doi: 10.1023/a:1009231110030.

Structural analysis of the amplified IFN-beta and DHFR genes in a Chinese hamster ovary cell line using multicolour FISH analysis

C Dixkens  1 , G Posseckert, T Keller, H Hameister
Affiliations

Structural analysis of the amplified IFN-beta and DHFR genes in a Chinese hamster ovary cell line using multicolour FISH analysis

C Dixkens et al. Chromosome Res. 1998 Jun.

Abstract

Multicolour FISH was used to get insight into the structural arrangement of a homogeneously staining region which bears the co-transfected and subsequently co-amplified IFN-beta and DHFR genes in a CHO cell line. On metaphase chromosomes an arrangement of multiple bands with regular spacing is revealed. On extended chromatin fibres a cluster of directly repeated and interspersed IFN-beta and DHFR genes is visible. Up to three clusters were found arranged in tandem. The different chromosomal mechanisms leading to gene amplification are discussed.

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