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Related Experiment Video

Updated: Jul 6, 2026

Simultaneous Affinity Enrichment of Two Post-Translational Modifications for Quantification and Site Localization
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Simultaneous Affinity Enrichment of Two Post-Translational Modifications for Quantification and Site Localization

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One-step sampling, extraction, and storage protocol for peptidomics using dihydroxybenzoic Acid.

Elena V Romanova1, Stanislav S Rubakhin, Jonathan V Sweedler

  • 1Department of Chemistry and the Beckman Institute, University of Illinois, 600 South Mathews Avenue 63-5, Urbana, Illinois 61801, USA.

Analytical Chemistry
|March 7, 2008
PubMed
Summary

Researchers developed a simple method using 2,5-dihydroxybenzoic acid (DHB) to extract signaling peptides (SPs) from various tissue types. This technique offers long-term sample preservation without freezing, simplifying peptide analysis.

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Area of Science:

  • Biochemistry
  • Neuroscience
  • Analytical Chemistry

Background:

  • Signaling peptides (SPs) are crucial biomolecules requiring effective extraction for characterization.
  • Existing methods for SP extraction from tissues can be complex and may not ensure long-term sample stability.

Purpose of the Study:

  • To introduce a simple, effective method for extracting endogenous signaling peptides from diverse tissue samples.
  • To demonstrate the utility of 2,5-dihydroxybenzoic acid (DHB) for both peptide extraction and long-term sample preservation.

Main Methods:

  • Utilized 2,5-dihydroxybenzoic acid (DHB), a matrix commonly used in MALDI mass spectrometry, for tissue extraction.
  • Applied the DHB extraction method to various tissue types including mouse pituitary gland, Aplysia bag cell neurons, rat cerebellum, and rat dorsal striatum.

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Proteomic Profile of EPS-Urine through FASP Digestion and Data-Independent Analysis
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Last Updated: Jul 6, 2026

Simultaneous Affinity Enrichment of Two Post-Translational Modifications for Quantification and Site Localization
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Simultaneous Affinity Enrichment of Two Post-Translational Modifications for Quantification and Site Localization

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Proteomic Profile of EPS-Urine through FASP Digestion and Data-Independent Analysis
14:48

Proteomic Profile of EPS-Urine through FASP Digestion and Data-Independent Analysis

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  • Assessed the stability of peptide extracts stored in DHB media over extended periods without refrigeration.

    • Main Results:

    • Successfully extracted 24 known and numerous putative peptides from individual mouse pituitary gland samples.
    • Demonstrated the effectiveness of DHB for extracting neuropeptides from different neuronal tissues.
    • Confirmed long-term stability of peptide extracts stored in DHB media for years without freezing.

    Conclusions:

    • The DHB-based method provides a technically simple, reproducible, and robust approach for signaling peptide extraction from tissues.
    • This method facilitates remote sample preparation and offers significant advantages for long-term storage without the need for freezing.
    • The DHB extraction technique is broadly applicable for analyzing signaling peptides across various biological systems.