TABLE 3.
Apparent affinities for sodium, potassium, ATP, vanadate, and digoxin under Na,K-ATPase turnover conditions
| SOPS | Brain PE | Brain SM | |
|---|---|---|---|
| K0.5Na+ (mm) | 16.4 ± 0.4 | 25.0 ± 0.5 | 20.3 ± 0.4 |
| p < 0.01 | p < 0.01 | ||
| K0.5K+ (mm) | 1.47 ± 0.06 | 1.01 ± 0.02 | 1.16 ± 0.06 |
| p < 0.01 | p < 0.05 | ||
| KmATP (μm) | 207 ± 3 | 204 ± 5 | 268 ± 12 |
| p < 0.05 | |||
| Kivanadate (μm) | 2.2 ± 0.04 | 1.0 ± 0.08 | 1.3 ± 0.2 |
| p < 0.01 | p < 0.05 | ||
| Kidigoxin (nm) | 298 ± 20 | 236 ± 23 | 257 ± 28 |