Detection and chromosomal assignment of SV40-DNA integration in Chinese hamster cell lines by chromosome sorting and dot blot hybridization.

A combination of cytometric (chromosome sorting), molecular (dot blot hybridization using radio-active and/or biotinylated DNA probes) and cytogenetic (G-banding) evaluation is described which allows the rapid identification of single copy and repetitive viral integrates and their assignment to chromosome groups or even individual chromosomes. In the case of Chinese hamster cell line CO 631 it could be demonstrated that SV40 DNA was solely integrated into a submetacentric marker chromosome. Such a cytometric/molecular/cytogenetic "identogram" may prove to be a useful tool in many areas of cell and tumor biology. Furthermore, amounts of chromosomes sufficient for analysis as well as subsequent cloning experiments can be accumulated.