Open lumina of microampullary electroreceptor organs in the transparent catfish, Kryptopterus bicirrhis (Valenciennes 1840), contain 50 mM potassium: why?
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Abstract
Administration of the cell impermeant fluorescent K+ and Na+ probes potassium-binding fluorescent indicator (PBFI) and sodium-binding fluorescent indicator (SBFI) to the lumina of ampullary electroreceptor organs in the transparent catfish Kryptopterus bicirrhis (Valenciennes 1840), demonstrated an unexpected high concentration of K+ ions: 50 mM. Since the lumina of the ampullary organs are in open contact with the surrounding water, such a high K+ concentration inside the lumen can be maintained only by heavy metabolic transport. The implications of this finding for stimulus transduction in freshwater ampullary electroreceptor cells are discussed.
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| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 261 | 37 | 10 |
| Full Text Views | 102 | 4 | 0 |
| PDF Views & Downloads | 17 | 6 | 0 |
Open lumina of microampullary electroreceptor organs in the transparent catfish, Kryptopterus bicirrhis (Valenciennes 1840), contain 50 mM potassium: why?
In: Animal BiologySearch for other papers by Robert Peters in
Current site
Google Scholar
PubMed
Search for other papers by Franklin Bretschneider in
Current site
Google Scholar
PubMed
Search for other papers by Lonneke Eeuwes in
Current site
Google Scholar
PubMed
Abstract
Administration of the cell impermeant fluorescent K+ and Na+ probes potassium-binding fluorescent indicator (PBFI) and sodium-binding fluorescent indicator (SBFI) to the lumina of ampullary electroreceptor organs in the transparent catfish Kryptopterus bicirrhis (Valenciennes 1840), demonstrated an unexpected high concentration of K+ ions: 50 mM. Since the lumina of the ampullary organs are in open contact with the surrounding water, such a high K+ concentration inside the lumen can be maintained only by heavy metabolic transport. The implications of this finding for stimulus transduction in freshwater ampullary electroreceptor cells are discussed.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 261 | 37 | 10 |
| Full Text Views | 102 | 4 | 0 |
| PDF Views & Downloads | 17 | 6 | 0 |