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| Content Provider | PubMed Central |
|---|---|
| Author | Fukushima, Y. Hagiwara, S. |
| Abstract | Electrical properties of the cell membrane were studied in the neoplastic lymphocyte, mouse myeloma cell line S194, by using the whole-cell patch clamp technique. Inward Ca2+ currents due to voltage-gated Ca2+ channels were found. The current, which decayed exponentially after reaching a peak, was first activated at about -50 mV and attained its maximum peak amplitude at about -20 mV in a 10 mM Ca2+ solution. Outward current was negligible for the potential range more negative than +30 mV. The channel was permeable to Sr2+ and Ba2+ in addition to Ca2+. Among these species, Sr2+ carried the greatest current. The time constants of the decay of the current depended neither on the species nor on the concentration of charge carrier. The steady-state inactivation was observed at potentials more negative than those at which the inward Ca2+ current was activated. Thus, we concluded that the inactivation of the channel was mainly voltage dependent. For reasons that are not yet understood, the amplitude of the Ca2+ current varied greatly among cells. |
| Starting Page | 2240 |
| File Format | |
| ISSN | 10916490 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 8 |
| Volume Number | 80 |
| Language | English |
| Publisher Date | 1983-04-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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