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Updated: Jul 25, 2026

Generation of High Quality Chromatin Immunoprecipitation DNA Template for High-throughput Sequencing (ChIP-seq)
Published on: April 19, 2013
Cystic fibrosis locus defined by a genetically linked polymorphic DNA marker.
Scientists discovered a DNA marker genetically linked to cystic fibrosis (CF), a common inherited disorder. This finding narrows the search for the CF gene, paving the way for molecular analysis and understanding the disease.
Area of Science:
- Human Genetics
- Molecular Biology
- Disease Gene Mapping
Background:
- Cystic Fibrosis (CF) is an autosomal recessive disorder affecting approximately 1 in 2000 Caucasian children.
- The genetic basis of CF necessitates precise gene localization for molecular analysis and therapeutic development.
Purpose of the Study:
- To identify and map DNA markers genetically linked to the cystic fibrosis gene.
- To narrow down the chromosomal location of the CF gene for further molecular investigation.
Main Methods:
- Genetic linkage analysis was performed in a cohort of 39 human families.
- A polymorphic DNA marker (D0CRI-917) was tested for linkage to the CF locus and the PON locus.
Main Results:
- A significant genetic linkage was established between the D0CRI-917 DNA marker and the cystic fibrosis gene.
- The DNA marker D0CRI-917 was also found to be linked to the PON locus, with estimated genetic distances of 5 centimorgans (cM) to PON and 15 cM to CF.
- The location of the CF gene was refined to approximately 1% of the human genome, roughly 30 million base pairs.
Conclusions:
- The discovery of a linked DNA polymorphism represents a critical first step towards the molecular analysis of the cystic fibrosis gene.
- While current data support a single locus for CF, the possibility of genetic heterogeneity warrants further investigation.
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