In a thermal vent deep in the Pacific, you discover a new bacterium, and decide to characterize its channels.One of them tends to flicker open and closed, so it’s easy to measure its reversal potential.
Under the following ionic conditions (given in mM), the current reverses at about +29 mV.
What ion is the channel permeable to?
ALLOW SOME PARTIAL CREDIT FOR WORK SHOWN.
| Ion | OUT | IN |
| Mg2+ | 50 | 5 |
| Sr2+ | 5 | 50 |
| Cl- | 260 | 65 |
| I- | 5 | 50 |
| La3+ | 50 | 5 |
| Dextrose | 0 | 195 |
