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A simple and efficient method for PCR amplifiable DNA extraction from ancient bones.
T Kalmár1, C Z Bachrati, A Marcsik
1Institute of Genetics, Biological Research Centre of Hungarian Academy of Sciences, POB 521, H-6701, Szeged, Hungary and Department of Anthropology, University of Szeged, Egyetem u. 2, H-6725, Szeged, Hungary. klampar@nucleus.szbk.u-szeged.hu
Nucleic Acids Research
|June 28, 2000
Summary
This study presents a fast, effective DNA extraction method for ancient human bones using modified ethanol precipitation. The protocol enhances DNA purification, significantly increasing polymerase chain reaction (PCR) amplification success rates.
Area of Science:
- Paleogenetics
- Molecular Biology
- Biochemistry
Background:
- Ancient DNA (aDNA) extraction from human bones is crucial for paleogenetic studies.
- Traditional methods often involve hazardous chemicals, specialized equipment, and multiple time-consuming steps.
- Improving DNA yield and purity from challenging bone matrices remains a key objective.
Observation:
- A modified ethanol precipitation protocol utilizing Dextran Blue as a carrier was developed.
- This method integrates bone powdering, incubation, and selective precipitation to remove PCR inhibitors.
- Key steps like decalcification, dialysis, and secondary PCR amplification were eliminated.
Findings:
- The protocol successfully extracted DNA from ten ancient human bone samples (500-1200 years old).
- Mitochondrial DNA sequencing was achieved using a mitochondrial-specific primer pair.
- All ten samples demonstrated successful PCR amplification after DNA purification.
Implications:
- This simplified protocol offers a faster and safer alternative for ancient DNA extraction.
- The method enhances the efficiency and success rate of ancient human bone DNA analysis.
- It provides a valuable tool for advancing research in human evolution and population genetics.