Extended Data Fig. 2: Laser scanning confocal microscopy of the fluorescence of Alexa- ϕFFF-P1P2 and Alexa-P1P2 injected at the sciatic nerve in rats.

Representative images are of sciatic nerves and surrounding tissues collected 15 min and 24 h after injection. Red: Alexa647, indicating formulations; blue: HOECHST33342, indicating nuclei.