Abstract
Nuclear markers for live imaging are useful for counting and tracking cells, visualizing cell division, and examining the regulation of proteins that are controlled via entry or exit from the nucleus. Near-infrared fluorescent proteins have advantages over shorter wavelength fluorescent proteins, including reduced phototoxicity, less light scattering, and enabling multicolor live imaging. We have constructed and tested transgenic Drosophila expressing Histone H2Av iRFP fusion proteins, and confirmed that they can be used to label nuclei in both fixed and live tissue at multiple stages of development.
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