ChR2(H134R)
Multi-Component SwitchChR2(H134R) is a mutant version of channelrhodopsin-2 used as an optogenetic light-actuation tool. In the cited cardiac fibroblast application, adenoviral delivery of ChR2(H134R) into primary cardiac fibroblasts enabled these non-excitable cells, under specific co-culture conditions with non-transformed cardiomyocytes, to participate in a light-sensitive excitable cardiac syncytium.