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Related Experiment Video

Updated: May 24, 2026

Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains
06:18

Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains

Published on: November 30, 2021

Empirical evaluation of bone extraction protocols.

Timothy P Cleland1, Kristyn Voegele, Mary H Schweitzer

  • 1Department of Marine, Earth, Atmospheric Sciences, North Carolina State University, Raleigh, North Carolina, United States of America. tpclelan@ncsu.edu

Plos One
|February 21, 2012
PubMed
Summary
This summary is machine-generated.

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Evaluating bone protein extraction methods for ancient samples is crucial. Hydrochloric acid demineralization and guanidine HCl or ammonium bicarbonate extraction yielded cleaner, purer ancient bone proteins for analysis.

Area of Science:

  • Paleoproteomics
  • Biochemistry
  • Analytical Chemistry

Background:

  • Characterizing ancient bone proteins requires efficient and clean extraction protocols.
  • High-resolution analytical techniques demand high-quality protein data from ancient specimens.
  • Previous studies have explored various protein extraction methods, but their effectiveness on ancient bone, particularly for comparative analysis, needs further evaluation.

Purpose of the Study:

  • To evaluate and compare different published bone protein extraction protocols using ostrich and moa cortical bone.
  • To assess the yield and purity of extracted proteins using enzyme-linked immunosorbent assay and gel electrophoresis.
  • To identify optimal demineralization and solubilization agents for ancient bone protein extraction.

Main Methods:

Related Experiment Videos

Last Updated: May 24, 2026

Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains
06:18

Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains

Published on: November 30, 2021

  • Cortical bone samples from ostrich and moa were subjected to various demineralization (hydrochloric acid vs. ethylenediaminetetraacetic acid) and protein extraction protocols.
  • Protein purity was assessed using gel electrophoresis, observing for smearing indicative of impurities.
  • Protein identification and yield were indirectly evaluated through antibody-antigen complex detection via enzyme-linked immunosorbent assay, focusing on collagen I, osteocalcin, and hemoglobin.

Main Results:

  • Hydrochloric acid demineralization resulted in cleaner extractions compared to ethylenediaminetetraacetic acid, which caused smearing in electrophoretic separation.
  • All tested denaturing agents (sodium dodecyl sulfate, urea, guanidine HCl) were effective for extracting bone proteins.
  • Guanidine HCl and ammonium bicarbonate buffers were effective for extracting bone proteins, yielding similar electrophoretic patterns and being suitable for downstream proteomics applications.

Conclusions:

  • Hydrochloric acid is a superior demineralizing agent for ancient bone protein extraction compared to ethylenediaminetetraacetic acid.
  • Guanidine HCl and ammonium bicarbonate are effective solubilizing agents for ancient bone proteins, with ammonium bicarbonate offering advantages for proteomics by eliminating the need for desalting.
  • Optimized extraction protocols are essential for advancing the study of ancient bone proteins using modern analytical techniques like proteomics.