Glutamine Synthesis and Its Relation to Photophosphorylation in Pisum Chloroplasts: Effects of 3-(3,4-Dichlorophenyl)-1,1-dimethylurea and Antimycin A 1
AUTOR(ES)
Givan, Curtis V.
RESUMO
Illuminated pea (Pisum sativum) chloroplasts can convert glutamate to glutamine using ATP generated by photophosphorylation to drive the glutamine-synthetase reaction. Light-dependent glutamine synthesis is sensitive to 3-(3,4-dichlorophenyl)-1,1-dimethyl urea (DCMU), but only at concentrations higher than are necessary to suppress photoreduction of ferricyanide or phosphoglycerate. Conversely, glutamine synthesis is far more sensitive to antimycin A than is photoconversion of phosphoglycerate to triosephosphate. When 3.8 mm phosphoglycerate is supplied, glutamine synthesis is stimulated in both the presence and absence of antimycin A.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=542085Documentos Relacionados
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