Switch to
| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
4
|
| pubmed:dateCreated |
1966-7-24
|
| pubmed:abstractText |
The mechanism for extrusion of Na(+) from Scenedesmus cells is characterized physiologically. It is stimulated by phosphate but oxygen is not necessary. Rb(+) and Cs(+) may also be extruded, but in the presence of Na(+) they cannot compete for the sites on the inside of the transport system. When Na(+) is extruded, Rb(+) and, by inference, K(+) seems to be transported as counter ion from the outside, and sodium ions compete only weakly for this external site. The parallelism between these findings and the Na(+)-K(+)-activated adenosine triphosphatases known from animal tissues is pointed out. With low additions of phosphate, the extrusion mechanism can keep the cells practically free from Na(+). Increasing the concentrations of external phosphate stimulates uptake more than extrusion, and a net uptake occurs. As for Rb(+) and Cs(+), they are taken up in the absence of external phosphate, but additions of P will greatly enhance the amounts absorbed. Two different ways of uptake are indicated.
|
| pubmed:commentsCorrections | |
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:chemical | |
| pubmed:status |
MEDLINE
|
| pubmed:month |
Apr
|
| pubmed:issn |
0032-0889
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
41
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
579-84
|
| pubmed:dateRevised |
2010-11-18
|
| pubmed:meshHeading | |
| pubmed:year |
1966
|
| pubmed:articleTitle |
Uptake and loss of Na, Rb, and Cs in relation to an active mechanism for extrusion of Na in Scenedesmus.
|
| pubmed:publicationType |
Journal Article,
In Vitro
|