Journal
AMERICAN JOURNAL OF PHYSIOLOGY-CELL PHYSIOLOGY
Volume 300, Issue 4, Pages C723-C742Publisher
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/ajpcell.00462.2010
Keywords
digital image analysis; fluorescence microscopy; confocal microscopy
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Funding
- National Institutes of Health (NIH) [DK-51098, DK-61594]
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Dunn KW, Kamocka MM, McDonald JH. A practical guide to evaluating colocalization in biological microscopy. Am J Physiol Cell Physiol 300: C723-C742, 2011. First published January 5, 2011; doi:10.1152/ajpcell.00462.2010.-Fluorescence microscopy is one of the most powerful tools for elucidating the cellular functions of proteins and other molecules. In many cases, the function of a molecule can be inferred from its association with specific intracellular compartments or molecular complexes, which is typically determined by comparing the distribution of a fluorescently labeled version of the molecule with that of a second, complementarily labeled probe. Although arguably the most common application of fluorescence microscopy in biomedical research, studies evaluating the colocalization of two probes are seldom quantified, despite a diversity of image analysis tools that have been specifically developed for that purpose. Here we provide a guide to analyzing colocalization in cell biology studies, emphasizing practical application of quantitative tools that are now widely available in commercial and free image analysis software.
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