A survey of museum specimens reveals that more than a dozen species of the birds sport biofluorescence in feathers, skin or even inside their throats.

Fluorescent proteins are also useful for tracking cell populations, such as tumor cells, in vivo. Thus far, the best tools for imaging in live, whole animals have been far-red fluorescent proteins ...

For a time, however, it appeared that fluorescent protein engineering had hit a 'yellow' wall in efforts to red-shift fluorescence emission. Fortuitously, this barrier had already been surmounted ...

When methylglyoxal interacts with mEB, the upconversion fluorescence shifts from red to green, allowing for precise detection. Researchers embedded the probe in a hydrogel, and employed 3D ...