ISSN:
1432-072X
Keywords:
Photophosphorylation
;
ATP hydrolysis
;
Arrhenius plots
;
Rhodospirillum rubrum
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Arrhenius plots for ATP synthesis, coupled to endogenous and Phenazine methosulfate or N,N,N′,N′,-Tetramenthyl-1,4-Phenylene diamine-mediated photosynthetic election transport and for ATP hydrolysis were studied in Rhodospirillum rubrum chromatophores. Coupled or uncoupler induced Mg-ATPase show no discontinuity in the range tested (30°C-5°C) and they also have the same activation energy. Phenazine methosulfatecatalyzed photophosphorylation has also a single activation energy where as the endogenous reaction shows complex and ageing dependent behaviour, alternating temperature ranges having high (45.2 to 144,4 kJ·mol-1) and very low (ca 0.0 to 3.3 kJ·mol-1) activation energy.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00446979
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