ISSN:
1432-072X
Keywords:
Photosynthetic Membrane
;
Lipid and Protein Composition
;
Reaction Center
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Rhodopseudomonas viridis was grown in the presence and in the absence of yeast extract. The cells grown under this latter condition present a ten fold diminished bacteriochlorophyll (bchl) content. This decrease was paralleled by a similar increase in the ratio lipid phosphorous/bchl, whereas the ornithine lipid/bchl ratio remains constant. Some quantitative differences in the fatty acid composition are also reported. The protein composition of both membranes was also studied, only indicating quantitative differences. An active reaction center preparation was obtained from both types of cells. When isolated from cells grown in the presence of yeast extract, this reaction center preparation shows the presence of proteins a, b, c and d. Further treatment of this active reaction center results, in cells grown under either condition, in the isolation of green (oxidized behl) and brown (inactive reaction center) bchl containing fractions. The protein composition and absorption spectrum of the inactive reaction centers obtained from both types of cells were identical (proteins a, c and d). On the other hand the green complexes differ in their protein composition as well as in their absorption spectrum.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00455943
