Fig. 3.

Fig. 3. Three-dimensional structures of the 3 omega motifs. NDQ motif-containing sodium-pump rhodopsin, NaR (cyan, PDB ID: 3X3B); NTQ motif-containing chloride-pump rhodopsin, ClR (green, PDB ID: 5G28); xanthorhodopsin, XR (magenta, PDB ID: 3DDL); Gleobacter rhodopsin, GR (orange, PDB ID: 6NWD); thermophilic rhodopsin, TR (blue, PDB ID: 5AZD).

© J. Microbiol. Biotechnol.