Protonex(TM) Red 670 AM *Cell-Permeable*

Protonex(TM) Red 670 AM is the cell-permeable version of Protonex(TM) Red 670. Protonex(TM) Red 670 dye works by changing its fluorescence intensity depending on the pH of the environment. Protonex(TM) Red 670 is minimally fluorescent at a basic pH and maximally fluorescent at an acidic pH. When Protonex(TM) Red 670 is bound to an acidic intracellular target, it becomes highly fluorescent and emits red light when excited by a red laser such as a 632 nm He-Ne or 647 nm red laser. By measuring the fluorescence intensity of Protonex(TM) Red 670, one can label or monitor the acidic intracellular targets in live cells.