Interferometric fluorescent super-resolution microscopy resolves 3D cellular ultrastructure

Gleb Shtengel, James A. Galbraith, Catherine G. Galbraith, Jennifer Lippincott-Schwartz*, Jennifer M. Gillette, Suliana Manley, Rachid Sougrat, Clare M. Waterman, Pakorn Kanchanawong, Michael W. Davidson, Richard D. Fetter, Harald F. Hess

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    641 Scopus citations


    Understanding molecular-scale architecture of cells requires determination of 3D locations of specific proteins with accuracy matching their nanometer-length scale. Existing electron and light microscopy techniques are limited either in molecular specificity or resolution. Here, we introduce interferometric photoactivated localization microscopy (iPALM), the combination of photoactivated localization microscopy with single-photon, simultaneous multiphase interferometry that provides sub-20-nm 3D protein localization with optimal molecular specificity. We demonstrate measurement of the 25-nm microtubule diameter, resolve the dorsal and ventral plasma membranes, and visualize the arrangement of integrin receptors within endoplasmic reticulum and adhesion complexes, 3D protein organization previously resolved only by electron microscopy. iPALM thus closes the gap between electron tomography and light microscopy, enabling both molecular specification and resolution of cellular nanoarchitecture.

    Original languageEnglish (US)
    Pages (from-to)3125-3130
    Number of pages6
    JournalProceedings of the National Academy of Sciences of the United States of America
    Issue number9
    StatePublished - Mar 3 2009


    • Fluorescence microscopy
    • Interferometry
    • PALM
    • Photoactivated localization microscopy
    • Single molecule imaging

    ASJC Scopus subject areas

    • General


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