Xinqi Zhou, Kayla J. Belavek, Marisol X. Navarro, Kayli N. Martinez, Abigail Hinojosa, Evan W. Miller. "Ratio-based indicators for cytosolic Ca
                    <sup>2+</sup>
                    with visible light excitation." Proceedings of the National Academy of Sciences, 2025. doi:10.1073/pnas.2410436122