Table 2.
Sensitivity characteristics of control and Gβ5-deficient rods
|
Strains |
io (photons/μm2) |
Single photon response amplitude (pA) |
Flash sensitivity [pA/(photons/μm2)] |
ld(pA) |
|---|---|---|---|---|
| Gβ5+/+ | 70 ± 5 (27) | 0.34 ± 0.04 (28) | 0.10 ± 0.01 (30) | 11.3 ± 0.5 (34) |
| Gβ5+/− | 96 ± 12 (16) | 0.41 ± 0.05 (13) | 0.10 ± 0.01 (16) | 12.6 ± 0.8 (19) |
| Gβ5−/−
|
80 ± 10 (20)
|
0.43 ± 0.07 (12)
|
0.14 ± 0.02 (26)
|
11.5 ± 0.6 (29)
|
All values are means ± SEMs. The number of rods used in each measurement is indicated in parentheses. io refers to the flash strength that elicited a half-maximal response. ld refers to the inward current in darkness.