Fig. 1.

Experimental design to examine the effect of monochromatic light on cardiomyocytes derived from embryonic stem (ES) cells and evaluation of the time kinetics of their cessation and recovery. Cardiomyocytes derived from ES cells were exposed to blue, green, or red light until complete cessation of beating was observed. Beatings were recorded every minute during monochromatic light exposure. Recovery of beating in the clusters following light exposure was monitored after 1, 2, 3, 6, 9, 12, and 24 h. The time frames indicated are not drawn to scale.