Abstract
Microscopy protocols that allow live-cell imaging of molecules and subcellular components tagged with fluorescent conjugates are indispensable in modern biological research. A breakthrough was recently introduced by the development of genetically encoded fluorescent tags that combined with fluorescence-based microscopic approaches of increasingly higher spatial and temporal resolution made it possible to detect single protein and nucleic acid molecules inside living cells. Here, we describe an approach to visualize single nascent pre-mRNA molecules and to measure in real time the dynamics of intron synthesis and excision.
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