ISSN:
1432-072X
Keywords:
Halobacterium
;
Chemostat
;
Energetics
;
Bacteriorhodopsin
;
Oxygen
;
Growth rate
;
Membrane
;
Regulation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The independent effects of oxygen tension and growth rate on bacteriorhodopsin synthesis in Halobacterium halobium have been studied in chemostat cultures. Bacteriorhodopsin synthesis occurs only at low growth rates and is stimulated by low oxygen tension. Fast growth rates override the stimulatory effects of oxygen tension, with the result that bacteriorhodopsin can scarcely be detected. Illumination of cultures maintained at low growth rate and low oxygen tension significantly increases the steady state cell yield. This finding suggests that under these conditions the purple membrane proton pump is coupled to energy transduction.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00405413
