| Literature DB >> 7510879 |
Abstract
The fractional contribution of Ca to current flow through neuronal-type nicotinic acetylcholine receptor channels was determined by quantitative fluorescence microfluorimetry using fura-2. The method, which has been applied already to several types of cells and channels is described in detail here. At -70 mV and 2 mM external Ca concentration it was found that Ca contributes 2.5% to the net current. The fractional contribution was found to be voltage dependent, increasing at negative potentials e-fold for a 110 mV potential difference. Total non-specific cation current was found to have a bell-shaped dependence on external Ca concentration peaking at 2 mM.Entities:
Mesh:
Substances:
Year: 1993 PMID: 7510879 DOI: 10.1007/bf00374879
Source DB: PubMed Journal: Pflugers Arch ISSN: 0031-6768 Impact factor: 3.657