Three new dinucleotide repeat polymorphisms on human chromosome 9: D9S970, D9S971, and D9S972
B S Kimmel1, P Miniou, S L Robbins
1Wistar Institute, Philadelphia, PA 19104, USA.
Human Genetics
|August 1, 1995
Summary
Researchers identified three novel microsatellite loci on human chromosome 9. These markers, D9S970, D9S971, and D9S972, exhibit high heterozygosity, making them valuable for genetic studies.
Area of Science:
- Genetics
- Genomics
- Molecular Biology
Background:
- Microsatellites, also known as short tandem repeats (STRs), are repetitive DNA sequences crucial for genetic mapping.
- Chromosome 9 harbors numerous genes and plays a role in various genetic disorders.
- Cosmid recombinants provide a method for isolating and characterizing specific DNA regions.
Purpose of the Study:
- To describe novel human chromosome 9-specific cosmid recombinants.
- To identify and characterize (CA)n microsatellite loci within these recombinants.
- To determine the subchromosomal localization and heterozygosity of these new microsatellite markers.
Main Methods:
- Isolation and characterization of human chromosome 9-specific cosmid recombinants.
- Identification of (CA)n microsatellite sequences within the cosmid clones.
- Determination of microsatellite heterozygosity rates.
- Subchromosomal localization using R-banding and fluorescence in situ hybridization (FISH).
Main Results:
- Three novel microsatellite loci, designated D9S970, D9S971, and D9S972, were identified on human chromosome 9.
- High heterozygosities were observed for these loci: 0.78 for D9S970, 0.84 for D9S971, and 0.82 for D9S972.
- Subchromosomal localizations for these microsatellite markers were successfully determined using R-banding and FISH.
Conclusions:
- The identified microsatellite loci (D9S970, D9S971, D9S972) are valuable genetic markers for human chromosome 9.
- Their high heterozygosity suggests significant potential for use in genetic linkage analysis and population genetics studies.
- The established subchromosomal localizations facilitate their integration into existing genetic maps of chromosome 9.
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