Microtubule Probe for Correlative Super-Resolution Fluorescence and Electron Microscopy
Battaglia, X. T.; De Pace, C.; Ruiz-Perez, L.; Chen, B.; Su, R.; Zhang, M.; Zhang, R.; Zhang, Q.; Wang, Q.; Zhou, H.; Wu, J.; Battaglia, G.; Zhang, Z.; Tian, Y.
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We report a versatile cyclometalated Iridium (III) complex probe that achieves synchronous fluorescence-electron microscopy correlation to reveal microtubule ultrastructure in cells. The selective insertion of probe between repeated and {beta} units of microtubule triggers remarkable fluorescent enhancement, and high TEM contrast due to the presence of heavy Ir ions. The highly photostable probe allows live cell imaging of tubulin localization and motion during cell division with an resolution of 20 nm, and under TEM imaging reveals the {beta} unit interspace of 45[A] of microtubule in cells.
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