title: Linkage analyses of multiple endocrine neoplasia, type 2A (MEN-2A) with 20 DNA polymorphisms: 5% of the genome excluded.
abstract: Pairwise linkage analyses are reported between the locus for multiple endocrine neoplasia type 2A (MEN-2A) and 20 restriction fragment length polymorphisms (RFLPs) in a single large kindred which was previously screened for linkage with this form of cancer using 23 blood group and serum protein polymorphisms. No significant, positive lod scores have been obtained so far. These 20 RFLPs have excluded the MEN2 locus from about as much of the genome as did the 23 classical markers previously reported. This is a clear demonstration of the value of RFLPs for linkage studies since these 20 RFLPs were not selected for being the most polymorphic of those available. Over 10% of the human genome has been excluded from linkage with the MEN2 locus in this particular family.
mesh_terms: D002874:Chromosome Mapping; D008040:Genetic Linkage; D005819:Genetic Markers; D006801:Humans; D009377:Multiple Endocrine Neoplasia / Q000235:genetics*; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D005819:Genetic Markers