期刊
NATURE PROTOCOLS
卷 4, 期 3, 页码 291-308出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nprot.2008.246
关键词
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资金
- National Institute of Allergy and Infectious Diseases [K25-AI-65459]
- National Science Foundation [CHE-0722759]
- National Institute of General Medical Sciences [GM070358, GM073913]
- University of Maine
- NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES [K25AI065459] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM070358, R01GM073913] Funding Source: NIH RePORTER
Fluorescence photoactivation localization microscopy (FPALM) images biological structures with subdiffraction-limited resolution. With repeated cycles of activation, readout and bleaching, large numbers of photoactivatable probes can be precisely localized to obtain a map (image) of labeled molecules with an effective resolution of tens of nanometers. FPALM has been applied to a variety of biological imaging applications, including membrane, cytoskeletal and cytosolic proteins in fixed and living cells. Molecular motions can be quantified. FPALM can also be applied to nonbiological samples, which can be labeled with photoactivatable probes. With emphasis on cellular imaging, we describe here the adaptation of a conventional widefield fluorescence microscope for FPALM and present step-by-step procedures to successfully obtain and analyze FPALM images. The fundamentals of this protocol may also be applicable to users of similar imaging techniques that apply localization of photoactivatable probes to achieve super-resolution. Once alignment of the setup has been completed, data acquisitions can be obtained in approximately 1-30 min and analyzed in approximately 0.5-4 h.
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