Table 2.
Characteristics of dark-adapted mouse rods from Gγ1 +/− mice. Number of recorded rods are given in parenthesis.
| Dark current (pA) |
Time to peak (ms) |
τrec (ms) |
Integratio n time (ms) |
Elementary amplitude (pA) |
Io (photons/ μm2) |
τD (ms) |
|
|---|---|---|---|---|---|---|---|
| WT | 14.6 ± 0.9 (18) |
115 ± 6 (18) |
175 ± 11 (18) |
256 ± 12 (18) |
0.95 ± 0.2 (18) |
59.8 ± 3.2 (18) |
227 ± 15 (16) |
| Gγ1+/− | 14.8 ± 1.0 (18) |
105 ± 10 (18) |
169 ± 13 (18) |
258 ± 22 (18) |
0.54 ± 0.10 (17) |
81.1 ± 4.6* (18) |
203 ± 24 (13) |
τrec was determined by fitting a single-exponential function to the final falling phase of the dim flash response; Io is the flash strength that elicited a half-maximal response; τD is the dominant time constant of photoresponse recovery as defined in (Pepperberg et al., 1992).
*
p=0.0004; Student’s two-tailed t-test with equal variances.