Somatic cell hybrid mapping panels have previously been constructed to assist in the regional assignment of anonymous DNA probes and cloned genes to human chromosome 17. While a substantial number of hybrids are available that subdivide the short arm of this chromosome and the proximal portion of its long arm into specific regions, relatively few exist with breakpoints in the distal portion of the long arm. To increase the resolution of this region, four additional human x rodent somatic cell hybrids have been constructed that include breakpoints spanning the region 17q22-->q24. Hybrid clones carrying the long-arm derivative of chromosome 17 were initially identified by fluorescence in situ hybridization. Hybrids were subsequently screened using the polymerase chain reaction with primer sets representing DNA markers previously mapped to chromosome 17. These hybrids expand the existing somatic cell hybrid panel for the distal portion of the long arm of chromosome 17.
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