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LIGHT‐INDUCED ABSORBANCY CHANGES IN EIMHJELLEN'S RHODOPSEUDOMONAS *
Author(s) -
Holt A. S.,
Clayton Roderick K.
Publication year - 1965
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1965.tb07925.x
Subject(s) - bacteriochlorophyll , rhodopseudomonas , photochemistry , absorption (acoustics) , chemistry , excited state , photosynthesis , wavelength , rhodopseudomonas palustris , absorption band , biophysics , biology , bacteria , biochemistry , physics , optics , atomic physics , genetics
— Light induced absorbancy changes in Rhodopseudomonas sp. NHTC 133 are analogous to those observed in other photosynthetic bacteria, but all of the features in the light‐induced difference spectrum (except those reflecting cytochrome oxidation) are shifted to greater wavelengths. This general shift is consistent with the fact that the bacteriochlorophyll of this organism (BChl b ) differs from the usual BChl in that its absorption bands are shifted to greater wavelengths. The singlet excited state of P985 (the counterpart of the P870 of Rhodopseudomonas spheroides ) is not an energy sink relative to the major component of BChl b in vivo . The absorption maximum of P985 is at 985 mp, whereas that of CBhl b in vivo is at 1012 mμ.