https://www.ncbi.nlm.nih.gov/Structure/pdb/7ZN9
7ZN9: Crystal structure of the light-driven inward proton pump xenorhodopsin BcXeR in the M state...
xenorhodopsinEICOSANEOLEIC ACIDPHOSPHATE ION
https://www.ncbi.nlm.nih.gov/Structure/pdb/7ZNA
7ZNA: Crystal structure of the light-driven inward proton pump xenorhodopsin BcXeR in the ground...
xenorhodopsin(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoateEICOSANEOLEIC ACIDPHOSPHATE IONSODIUM ION