ISSN:
1432-072X
Keywords:
Phosphoribulokinase
;
d-ribulose 1,5-bisphosphate carboxylase-oxygenase
;
Phosphoglycollate phosphatase
;
Glycollate dehydrogenase
;
Heterocysts
;
Anabaena cylindrica
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Activities of enzymes of photosynthesis and photorespiration have been measured in extracts of vegetative cells and heterocysts from the filamentous cyanobacterium Anabaena cylindrica. Phosphoribulokinase, d-ribulose 1,5-bisphosphate carboxylase/oxygenase, phosphoglycollate phosphatase and glycollate dehydrogenase activities were readily measured in vegetative cell extracts, but were undetectable or negligible in heterocyst preparations. The data help to explain why heterocysts are unable to perform photosynthetic CO2 fixation. They also exemplify the co-ordinate compartmentation of enzymes of photosynthesis and photorespiration which occur in a differentiated phototrophic prokaryote.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00427720
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