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Related Experiment Videos

Polypeptide sequencing by liquid chromatography mass spectrometry.

B G Dawkins, P J Arpino, F W McLafferty

    Biomedical Mass Spectrometry
    |January 1, 1978
    PubMed
    Summary

    This study tested an automated polypeptide sequencing system using liquid chromatography-mass spectrometry. While effective for some mixtures, side-products complicate interpretation, necessitating further optimization for complex samples.

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    Area of Science:

    • Biochemistry
    • Analytical Chemistry
    • Proteomics

    Background:

    • Automated polypeptide sequencing is crucial for understanding protein function.
    • Existing methods face challenges with complex mixtures and sensitivity.

    Purpose of the Study:

    • To evaluate key steps of a novel automated polypeptide sequencing system.
    • To assess the system's performance with oligopeptide mixtures.

    Main Methods:

    • Utilized a liquid chromatograph-mass spectrometer-computer system.
    • Tested with mixtures of up to six model oligopeptides at the low nanomole level.

    Main Results:

    • Complete sequence information was obtained for many, but not all, mixtures.
    • Derivatization process generated side-products complicating interpretation.

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  • System demonstrated potential at the low nanomole level.

    • Conclusions:

    • The automated system shows promise for polypeptide sequencing.
    • Minimizing side-products is essential for complex mixtures and subnanomole sensitivity.
    • The system offers unique advantages over other automated sequencing methods.