Summary
The polymorphic locus D19S11 consists of four closely linked RFLPs: α, β, δ and γ on chromosome 19p13.2→19cen, revealed by subclones p13-1-82 and p13-2-21 from cosmid 1–13. Here, we report that p13-1-25, an additional subclone of c1-13, reveals three insertion/deletion RFLPs, α, ε, and ϕ, at the D19S11 locus. In situ hybridization of p13-1-25 to metaphase chromosomes from a carrier of a 19/X translocation with a breakpoint near the centromere confirms localization of D19S11 to 19p. Studies with hydatidiform moles have generated assignments of specific restriction fragments to these three loci, and genotypic studies in three-generation families have indicated that they are closely linked. Loci α (also detected by p13-1-82) and ϕ each have but two common alleles, whereas ε has at least 33 alleles, including a null allele. Fifty unrelated individuals tested displayed unique fragment patterns on Taq I blots probed with p13-1-25. Applications of this probe include monitoring loss of chromosome 19 during tumorigenesis, monitoring engraftment of donor bone marrow after transplantation, testing for paternity, and mapping disease genes on chromosome 19.
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Buroker, N.E., Bufton, L., Surti, U. et al. A hypervariable region at the D19S11 locus. Hum Genet 76, 90–95 (1987). https://doi.org/10.1007/BF00283056
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DOI: https://doi.org/10.1007/BF00283056