Kinetic and sensitivity parameters of rods
| Animal line | rmax (pA) | SfD (pA photon−1 · μm2) | I0 (photons · μm−2) | ti (ms) | τD (ms) |
|---|---|---|---|---|---|
| WT (21) | 14.5 ± 0.7 | 0.34 ± 0.13 | 27 ± 1 | 262 ± 15 | 185 ± 11 |
| RK+/− (13) | 15.0 ± 1.4 | 0.33 ± 0.03 | 30 ± 1 | 386 ± 34 | 217 ± 15 |
| R9AP95 (12) | 11.5 ± 1.1 | 0.06 ± 0.01 | 105 ± 1 | 109 ± 15 | 54 ± 3 |
| RK+/−:R9AP95 (14) | 16.1 ± 1.0 | 0.20 ± 0.02 | 50 ± 1 | 192 ± 17 | 73 ± 4 |
| Bark/RK4 (18) | 13.3 ± 0.8 | 0.32 ± 0.04 | 28 ± 1 | 396 ± 37 | 141 ± 8 |
| Bark/RK7 (21) | 15.0 ± 0.6 | 0.36 ± 0.03 | 29 ± 1 | 444 ± 19 | 212 ± 10 |
| Bark/RK7:R9AP95 (18) | 11.2 ± 0.6 | 0.18 ± 0.01 | 48 ± 1 | 470 ± 47 | 149 ± 19 |
| Bark/RK7:Rv−/− (15) | 10.9 ± 0.7 | 0.38 ± 0.04 | 24 ± 1 | 349 ± 43 | 213 ± 23 |
All values are mean ± SEM. Values of rmax (maximum response amplitude) were determined cell by cell from responses to saturating flashes; SfD (dark-adapted flash sensitivity), by dividing the peak amplitude of the mean dim-flash response for each cell by the flash intensity; I0 (the intensity required to produce a half-maximal response), from the fit of response-intensity data for each cell to a Boltzmann function in the program Origin; ti (the integration time), from the time integral of the mean dim-flash response for each cell divided by the peak amplitude of the response; and τD (the Pebberberg constant) for dark-adapted rods as described in Materials and Methods.