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. 2015 Dec 13;5(2):212–223. doi: 10.1002/mbo3.321

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© 2015 The Authors. MicrobiologyOpen published by John Wiley & Sons Ltd.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Phylogenetic tree of microbial rhodopsins. A tree inferred from 185 conserved amino acid positions was constructed using MEGA5. Bootstrap values for 1000 replicates are shown next to the branches. Boldface represents strains isolated in this study. Closed and open circles indicate strains containing three rhodopsins and two rhodopsins, respectively. ActR, Actinorhodopsin; BR, Bacteriorhodopsin; ClR, Chloride ion rhodopsin; HR, Halorhodopsin; NaR, Sodium ion rhodopsin; PR, Proteorhodopsin; SRI and II, Sensory rhodopsin I and II; XR, Xanthorhodopsin; XeR, Xenorhodopsin.