Bacteriorhodopsin (bR) is presently a classical example of membrane protein crystallization. We are comparing the structure of bR with the homology model of octopus rhodopsin (octR), which is similar in topology to bR and as highly ordered in its native membranes as bR in purple membranes. Such comparison provides insights for optimization of present octR experimentation both for crystallization and for application in nanobiotechnology in a manner similar to bR, and possibly even superior in optical computation.