How to Watch the Electron Dance in Living Cells ⚡ экспресс
The role of spin-correlated radical pairs in biology is attracting growing attention due to their involvement in weak magnetic field effects and possible applications in quantum biomedicine. Fluorescence microscopy has the sensitivity to study these effects in living cells, but direct resolution of radical pair dynamics is challenging because biologically relevant pairs typically do not fluoresce. To overcome this limitation, two new microscopy methods are proposed: single-color fluorescence pump-probe (PP) and pump-field-probe (PFP). The principles of operation are described, a mathematical formulation is provided, and validation was carried out through theoretical analysis and experiments on well-studied, magnetic field-sensitive flavin-dependent reactions. These approaches create a sensitive and universal platform for quantifying and visualizing quantum spin dynamics of radical pair chemical reactions in biological systems.
Inside every living cell, chemical transformations are constantly taking place. Some of them create unstable particles whose electrons behave like paired magnets. Their interaction resembles a dance: each movement of the pair responds to external magnetic fields, as if to a changing rhythm.
The invisibility of this dance prevented us from seeing it directly. Now scientists illuminate the cell with a pair of ultrashort laser flashes. The first sparks the dancers into motion; the second, arriving precisely an instant later, makes the reaction products glow. By analyzing the change in brightness of this glow, they reconstruct each 'step,' revealing a picture of the chemistry of magnetic interactions.
The method was tested on cells containing a magnetism-sensitive molecule. The same principle explains the navigation of migratory birds: their visual cells capture the electron dance, translating Earth's magnetic field into tangible images. In the future: portable sensors and therapies controlled by weak magnetic pulses.
🎯 Migratory birds use this same mechanism: their eyes capture the electron dance, turning Earth's magnetic field into visual cues.