A radiation hybrid map of the BRCA1 region of chromosome 17q12-q21.

The chromosomal region 17q12-q21 contains a gene (BRCA1) conferring susceptibility to early-onset familial breast and ovarian cancer. An 8000-rad radiation-reduced hybrid (RH) panel was constructed to provide a resource for long-range mapping of this region. A large fraction of the hybrids (approximately 90%) retained detectable human chromosome 17 sequences.