Ultrafast energy transfer in chlorosomes from the green photosynthetic bacterium Chloroflexus aurantiacus

Journal Article · Thu Feb 29 00:00:00 EST 1996 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/jp953734k· OSTI ID:227710

Savikhin, S; Struve, W S ^[1]; Zhu, Y; Blankenship, R E ^[2]

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1. Ames Lab., IA (United States)
2. Arizona State Univ., Tempe, AZ (United States)

Energy transfers between the bacteriochlorophyll c and a antennae in light-harvesting chlorosomes from the green bacterium Chloroflexus aurantiacus have been studied in two-color pump-probe experiments with improved sensitivity and wavelength versatility. The BChl c {yields} 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 {yields} BChl a energy-transfer step contribute materially to the empirical rod-to-baseplate energy-transfer kinetics. 11 refs., 2 figs., 1 tab.

• OSTI ID: 227710
• Journal Information: Journal of Physical Chemistry, Vol. 100, Issue 9; Other Information: PBD: 29 Feb 1996
• Country of Publication: United States
• Language: English

Related Subjects

55 BIOLOGY AND MEDICINE
BASIC STUDIES
40 CHEMISTRY
66 PHYSICS
PROTEINS
ENERGY TRANSFER
CHEMICAL REACTION KINETICS
PHOTOCHEMICAL REACTIONS
BACTERIA
PHOTOSYNTHESIS
PHOTOSYNTHETIC REACTION CENTERS