Excitation energy transfer in chlorosomes from photosynthetic green @entity599 bacteria, @entity19437 (Cba.) tepidum and @entity61568 (Pst.) aestuarii, have been studied at room temperature by time-resolved femtosecond transient absorption spectroscopy. Bleach rise times from 117 to 270 fs resolved for both chlorosomes reflect extremely efficient @entity5044 . Bleach relaxation times, from 1 to 3 ps and 25 to 35 ps, probed at 758 nm were tentatively assigned to @entity5044 based on amplitude changes of the global fits and model calculations. The anisotropy decay constant of about 1 ps resolved at 807 nm probe wavelength for the chlorosomes from @entity43762 , Pst. aestuarii and Cba. tepidum was related to energy transfer between bacteriochlorophyll a molecules of the baseplate and partly to @entity5044 . The longer anisotropy components 6.6, 8.8 and 12.1 ps resolved for the three chlorosomes, respectively, were assigned to chlorosome to baseplate energy transfer. Global fits of magic-angle data also revealed longer chlorosome to baseplate energy transfer components from 95 to 135 ps, in accord with results from simulations.

Excitation energy transfer in isolated chlorosomes from XXXX and @entity61568 .

@entity5044 :: ('OMIM:143470', 'Disease') :: ['intrachlorosomal energy transfer'] @entity43762 :: ('1108', 'Species') :: ['Chloroflexus aurantiacus'] @entity61568 :: ('1102', 'Species') :: ['Prosthecochloris'] @entity599 :: ('MESH:D013455', 'Chemical') :: ['sulfur'] @entity19437 :: ('1097', 'Species') :: ['Chlorobaculum']
@entity19437 :: (1097,Species) :: ['Chlorobaculum tepidum']
