Chromosomal mapping of human genes by radioactive hybridization of cDNAs to CEPH-YAC high density gridded filter sets

Chromosomal assignment of human transcribed sequences has been done mainly by high throughput genome analysis in specialized genome centres and, in a more classical fashion, by fluorescence in-situ hybridization (FISH) analysis. Not every laboratory has the ability to map cDNAs by FISH analysis. We here report a rapid mapping approach that is based on the hybridization of cDNA probes to high density gridded CEPH-YAC filters followed by subsequent computational analysis by database searches in the internet. Not only transcribed sequences but also genomic DNA could be subjected to this mapping approach. The presented approach allows to map human transcribed and genomic DNAs within 1–3 days and with a high level of resolution that will constantly increase in line with the incorporation of data deriving from high throughput genome mapping.