A BrdU-enhanceable fragile site or viral modification site at 11q23.1 in lymphoblastoid cultures

Abstract
Chromosomes prepared from EBV-transformed lymphoblastoid cell lines show an achromatic gap or fragile sitelike lesion at llq23.1. The low spontaneous expression of this lesion is greatly enhanced by BrdU and n-butyric acid. The lesion was expressed homozygously in all 16 cell lines examined. It is suggested that the lesion is a viral chromosome modification site.