Classifying by colors: FISH-based genome analysis

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Abstract
In recent years a fascinating evolution of different multicolor fluorescence in situ hybridization (FISH) technologies could be witnessed. The various approaches to cohybridize multiple DNA probes in different colors opened new avenues for FISH-based automated karyotyping or the simultaneous analysis of multiple defined regions within the genome. These developments had a remarkable impact on microscopy design and the usage of highly sensitive area imagers. In addition, they led to the introduction of new fluorochromes with appropriate filter combinations, refinements of hybridization protocols, novel probe sets, and innovative software for automated chromosome analysis. This paper attempts to summarize the various multicolor approaches and discusses the application of the individual technologies.