Scientists have identified the mechanism that allows fluorescent proteins to switch colour in two phases. They are thereby laying the groundwork for new applications in microscopy and functional ...

In their reduced forms, compound 1 and compound 2 exhibited bright yellow and red fluorescence, respectively, with strong visible emissions at 560 nm and 599 nm, and quantum yields of 58% and 43%.

Red fluorescence increases with depth in reef fishes, supporting a visual function, not UV protection. Proceedings of the Royal Society B, July 2014 DOI: 10.1098/rspb.2014.1211; ...