ISSN:
1432-072X
Keywords:
Rhodopseudomonas capsulata
;
Membrane differentiation
;
Photophosphorylation
;
Succinate dehydrogenase
;
NADH dehydrogenase
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract By means of sucrose density centrifugation three membrane fractions, named “light, medium and heavy” have been isolated from cells of Rhodopseudomonas capsulata strain 37b4, adapting from chemotrophic to phototrophic growth conditions. Succinate dehydrogenase activity of aerobically grown cells was mainly confined to the heavy (chromatophore) fraction. Upon changing to phototrophic conditions the activity of the succinate dehydrogenase increased in the medium and light fraction. All fractions contain bacteriochlorophyll. NADH dehydrogenase of chemotrophically grown cells was enriched in the light and medium fraction but is increased in the heavy fraction under phototrophic growth conditions. The capacity of photophosphorylation is high in the light and heavy fraction. The results indicate a differentially incorporation of functional subunits into specific parts of the membrane system during membrane differentiation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00428019
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