Abstract
Kinetochores play essential roles in coordinating mitosis, as a mechanical connector between chromosome and microtubule and as a source of numerous biochemical signals. These mechanical and biochemical behaviors of kinetochores change dynamically in cells during mitosis. Therefore, understanding kinetochore function requires an imaging tool that quantifies the protein-protein interactions or biochemical changes with high spatiotemporal resolution. FRET has previously been used in combination with biosensors to probe protein-protein interactions and biochemical activity. In this chapter, we introduce FLIM-FRET, a lifetime-based method that quantifies FRET, and describe the use of FLIM-FRET as a method for studying dynamic kinetochore behavior in cells with high spatiotemporal resolution.
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