Calcium ions act as signals between cells, but their exact locations — at the nanometre scale — have been difficult to pinpoint. The latest biosensor promises to reveal these details in dynamic living systems.
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Chang, C. Ions illuminated. Nature 448, 654–655 (2007). https://doi.org/10.1038/448654a
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DOI: https://doi.org/10.1038/448654a
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