Linked Life Data

16662330

Source:http://linkedlifedata.com/resource/pubmed/id/16662330

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2010-6-29
pubmed:abstractText
The response of the membrane potential to HCO(3) (-) supply has been studied in the cyanobacterium Anabaena variabilis strain M-3 under various conditions. Changes in potential were followed with the aid of the lipophilic cation tetraphenyl phosphonium bromide.Addition of HCO(3) (-) to CO(2)-depleted cells resulted in rapid hyperpolarization. The rate and extent of hyperpolarization were greater in low-CO(2)-adapted than in high-CO(2)-adapted cells. Addition of the electron acceptor p-nitrosodimethylaniline which resulted in O(2) evolution in CO(2)-depleted cells did not cause hyperpolarization. The hyperpolarization was not attributable to a change in pH or in ionic strength of the medium. Pretreatment with 3-(3,4-dichlorophenyl)-1,1-dimethylurea prevented the hyperpolarization. KCN depolarized hyperpolarized cells. Addition of HCO(3) (-) also brought about immediate K(+) influx which was succeeded after about 2 minutes by K(+) efflux.TWO OF THE MODELS CONSIDERED WOULD BE CAPABLE OF EXPLAINING THESE AND PREVIOUS FINDINGS: (a) a primary electrogenic pump for transporting HCO(3) (-) ions; (b) proton-HCO(3) (-) contransport, the driving force for which is generated by a proton pump which is sensitive to the HCO(3) (-) concentration.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Apr
pubmed:issn
0032-0889
pubmed:author
pubmed:issnType
Print
pubmed:volume
69
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
978-82
pubmed:dateRevised
2010-9-15
pubmed:year
1982
pubmed:articleTitle
Involvement of a Primary Electrogenic Pump in the Mechanism for HCO(3) Uptake by the Cyanobacterium Anabaena variabilis.
pubmed:affiliation
Department of Botany, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel.
pubmed:publicationType
Journal Article