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 @entity19437 and XXXX .

@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']
@entity61568 :: (1102,Species) :: ['Prosthecochloris aestuarii']
