title: Ultrafast energy transfer in chlorosomes from the green photosynthetic bacterium Chloroflexus aurantiacus.
abstract: Energy transfers between the bacteriochlorophyll c and a antennae in light-harvesting chlorosomes from the green bacterium Chloroflexes aurantiacus have been studied in two-color pump-probe experiments with improved sensitivity and wavelength versatility.  The BChl c --> BChl a energy transfers are well simulated with biexponential kinetics, with lifetimes of 2-3 and 11 ps.  They do not exhibit an appreciable subpicosecond component.  In the context of a kinetic model for chlorosomes, these lifetimes suggest that both internal BChl c processes and the BChl c --> BChl a energy-transfer step contribute materially to the empirical rod-to-baseplate energy-transfer kinetics.
authors.affiliation: Ames Laboratory and Department of Chemistry, Iowa State University, Ames 50011, USA.
authors.forename: S
authors.initials: S
authors.lastname: Savikhin
authors.forename: Y
authors.initials: Y
authors.lastname: Zhu
authors.forename: R E
authors.initials: RE
authors.lastname: Blankenship
authors.forename: W S
authors.initials: WS
authors.lastname: Struve
mesh_terms: D001426:Bacterial Proteins / Q000378:metabolism*; D001429:Bacteriochlorophylls / Q000378:metabolism*; D019414:Chlorobi / Q000378:metabolism* / Q000502:physiology / Q000648:ultrastructure; D004735:Energy Transfer; D007700:Kinetics; D045342:Light-Harvesting Protein Complexes; D015388:Organelles / Q000378:metabolism* / Q000502:physiology; D045322:Photosynthetic Reaction Center Complex Proteins; D013057:Spectrum Analysis
chemical_list: D001426:Bacterial Proteins; D001429:Bacteriochlorophylls; D045342:Light-Harvesting Protein Complexes; D045322:Photosynthetic Reaction Center Complex Proteins; C002084:bacteriochlorophyll c