(S)-β-Methylphenethylamine

Building block for the enantioselective synthesis of pyrizinostatin, a pyroglutamyl peptidase inhibitor.

Bacteriorhodopsin is the prototypical "seven-helix" transmembrane protein (with seven α-helical domains), whose study led to advances in understanding G protein-coupled receptors (GPCRs). In Halobacteria, it acts as a light-harvesting protein, producing a proton gradient across the cell wall that is then used to drive biosynthetic processes.