Parameters of Ca2+ blockade of Na+ Orai3 currents
| Channel type | Ki | n | kon | koff | Unitary current |
| µM | M−1s−1 | s−1 | fA | ||
| Orai3 (STIM1-gated) | 25 | 1.2 | 4 × 106 | 33 | 71 |
| Orai3 (2-APB–gated) | 26 | 1.2 | 3 × 107 | 246 | 283 |
| E81D Orai3 (STIM1-gated) | 111 | 1.0 | 4 × 105 | 130 | – |
| E81D Orai3 (2-APB–gated) | 154 | 1.0 | – | – | – |
| E165A Orai3 (2-APB–gated) | 32 | 1.2 | – | – | – |
| Channel type | Unitary current | ||||
| Orai3 (STIM1-gated) | 25 | 1.2 | 4 × 106 | 33 | 71 |
| Orai3 (2-APB–gated) | 26 | 1.2 | 3 × 107 | 246 | 283 |
| E81D Orai3 (STIM1-gated) | 111 | 1.0 | 4 × 105 | 130 | – |
| E81D Orai3 (2-APB–gated) | 154 | 1.0 | – | – | – |
| E165A Orai3 (2-APB–gated) | 32 | 1.2 | – | – | – |
–, not determined.
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