title: Absorption and circular dichroism spectroscopies.
mesh_terms: D001436:Bacteriorhodopsins; D002462:Cell Membrane / Q000502:physiology; D002942:Circular Dichroism / Q000379:methods*; D007425:Intracellular Membranes / Q000502:physiology; D008563:Membrane Lipids / Q000502:physiology; D008566:Membranes / Q000502:physiology* / Q000648:ultrastructure; D011099:Polyglutamic Acid; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D013057:Spectrum Analysis / Q000379:methods*
chemical_list: D008563:Membrane Lipids; D011099:Polyglutamic Acid; D001436:Bacteriorhodopsins