%0 Journal Article %T An orange calcium-modulated bioluminescent indicator for non-invasive activity imaging %J - %D 2019 %R https://doi.org/10.1038/s41589-019-0256-z %X Fluorescent indicators are used widely to visualize calcium dynamics downstream of membrane depolarization or G-protein-coupled receptor activation, but are poorly suited for non-invasive imaging in mammals. Here, we report a bright calcium-modulated bioluminescent indicator named Orange CaMBI (Orange Calcium-modulated Bioluminescent Indicator). Orange CaMBI reports calcium dynamics in single cells and, in the context of a transgenic mouse, reveals calcium oscillations in whole organs in an entirely non-invasive manner %U https://www.nature.com/articles/s41589-019-0256-z