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Phylogenetic tree of microbial rhodopsins (adapted from Ernst et al. 2014). Microbial rhodopsins shown are: chloride ion pumps; fungal and algal proton pumps; green, channelrhodopsins; Eubacteria proton pumps; purple, photosensors; archaeal proton pumps. Table with name of photosensory pigment, genus and species, and accession number (adapted from Ernst et al. 2014).
