A method for painting a chromosome or chromosome region by fluorescence in situ hybridization (FISH) without blocking DNA is described. Both unique sequence and repetitive sequence components of a fluorescently labeled probe are hybridized under low-stringency conditions, but the chromosomes are washed in such a manner that repetitive sequences are differentially removed, while region-specific unique sequence fragments remain bound to the target chromosomes. We refer to this differential retention and removal of probe components as differential stability FISH.
All Science Journal Classification (ASJC) codes
- Cell Biology