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Related Concept Videos

Immunogold Electron Microscopy01:20

Immunogold Electron Microscopy

Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.

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Staining membrane-bound proteins with colloidal gold.

Wayne R Stochaj, Tom Berkelman, Nancy Laird

    CSH Protocols
    |April 10, 2012
    PubMed
    Summary
    This summary is machine-generated.

    Colloidal Gold staining is a highly sensitive method for detecting proteins on membranes, offering permanent red staining for as little as 1-3 ng of protein. This technique works effectively on nitrocellulose and PVDF membranes.

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    Area of Science:

    • Biochemistry
    • Molecular Biology
    • Analytical Chemistry

    Background:

    • Protein detection on membranes is crucial for various biological assays.
    • Existing staining techniques may lack sensitivity or permanence.
    • Colloidal Gold offers a highly sensitive alternative for protein visualization.

    Purpose of the Study:

    • To highlight the sensitivity and application of Colloidal Gold staining for proteins on membranes.
    • To compare its efficacy on different membrane types.

    Main Methods:

    • Utilizing Colloidal Gold solution for protein staining on membranes.
    • Assessing detection limits and membrane compatibility.

    Main Results:

    • Colloidal Gold staining detects proteins with high sensitivity, down to 1-3 ng.
    • Protein spots are permanently stained a distinct dark red.
    • Effective on nitrocellulose and PVDF membranes.
    • Not recommended for nylon membranes.

    Conclusions:

    • Colloidal Gold is a superior staining technique for proteins on nitrocellulose and PVDF membranes due to its high sensitivity and permanent staining.
    • It provides reliable and visible protein detection in biochemical and molecular biology applications.