title: Low temperature photoacoustic spectroscopy of the purple membrane of Halobacterium halobium.
abstract: The photoacoustic spectra of light- and dark-adapted bacteriorhodopsin in aqueous and mixed water-glyc-erol (1:2) suspensions are studied in the 90-300 K temperature range. Photochemical transients are observed and interpreted in terms of the known photocycles of trans- and 13-cis-bacteriorhodopsin. The spectra differ from those obtained by low temperature optical absorption spectroscopy of glassy glycerol-water suspensions.
authors.forename: P S
authors.initials: PS
authors.lastname: Bechthold
authors.forename: K D
authors.initials: KD
authors.lastname: Kohl
authors.forename: W
authors.initials: W
authors.lastname: Sperling