Hydrogen peroxide is a signaling molecule that can also cause damage if its levels are too high. Here, the authors report HyPerFLEX, a fluorescent sensor with tenable colors, to track very low peroxide levels in cellular organelles, even in low-oxygen or highly oxidizing environments.
- Ekaterina S. Potekhina
- Dina I. Bass
- Vsevolod V. Belousov
