A photoactivatable marker protein for pulse-chase imaging with superresolution.

Fuchs, Jochen; Böhme, Susan; Oswald, Franz; Hedde, Per Niklas; Krause, Maike; Wiedenmann, Jörg; Nienhaus, G Ulrich · Nat Methods · 2010

basic_science · Level V

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Abstract

IrisFP is a photoactivatable fluorescent protein that combines irreversible photoconversion from a green- to a red-emitting form with reversible photoswitching between a fluorescent and a nonfluorescent state in both forms. Here we introduce a monomeric variant, mIrisFP, and demonstrate how its multiple photoactivation modes can be used for pulse-chase experiments combined with subdiffraction-resolution imaging in living cells by using dual-color photoactivation localization microscopy (PALM).

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