FIG. 1.

In situ hybridization pattern along the FRA7H region. (a) A cosmid map covering the FRA7H region. The SV40 and the ZNF131 pseudogene integration sites are marked by arrows. (b) Percentage of in situ hybridization signals in nuclei from the entire cell cycle, upon treatment with the fragility inducer (+aphidicolin). (c) The same analysis in nuclei grown under normal growth conditions (−aphidicolin). The percentage of alleles showing D signals (DD plus one-half SD nuclei) are indicated below each cosmid clone.