Table 1. Kinetic and sensitivity... | Rockefeller University Press

Table 1.

Kinetic and sensitivity parameters of rods

Animal line (number of rods)	r_max	$S_{F}^{D}$	I_1/2	t_i	τ_D
	pA	pA photon⁻1 µm²	photons µm⁻²	ms	ms
WT (22)	14.2 ± 0.7	0.34 ± 0.02	26 ± 2	262 ± 16	185 ± 11
R9AP+/− (24)	14.6 ± 0.7	0.29 ± 0.04	40 ± 4	319 ± 24	254 ± 18
R9AP+/−;RKS561L (28)	13.5 ± 0.7	0.12 ± 0.02	79 ± 8	254 ± 28	182 ± 10
R9AP+/−;Rv−/− (8)	12.0 ± 1.2	0.32 ± 0.09	28 ± 3	243 ± 45	187 ± 16
GAPux (28)	13.9 ± 0.8	0.32 ± 0.03	35 ± 4	418 ± 30	248 ± 12
GAPux;RKS561L (29)	13.5 ± 0.7	0.11 ± 0.01	89 ± 9	231 ± 17	179 ± 10
GAPux;Rv−/− (17)	9.9 ± 0.9	0.31 ± 0.03	36 ± 6	239 ± 18	204 ± 14

Animal line (number of rods)	r_max	$S_{F}^{D}$	I_1/2	t_i	τ_D
	pA	pA photon⁻1 µm²	photons µm⁻²	ms	ms
WT (22)	14.2 ± 0.7	0.34 ± 0.02	26 ± 2	262 ± 16	185 ± 11
R9AP+/− (24)	14.6 ± 0.7	0.29 ± 0.04	40 ± 4	319 ± 24	254 ± 18
R9AP+/−;RKS561L (28)	13.5 ± 0.7	0.12 ± 0.02	79 ± 8	254 ± 28	182 ± 10
R9AP+/−;Rv−/− (8)	12.0 ± 1.2	0.32 ± 0.09	28 ± 3	243 ± 45	187 ± 16
GAPux (28)	13.9 ± 0.8	0.32 ± 0.03	35 ± 4	418 ± 30	248 ± 12
GAPux;RKS561L (29)	13.5 ± 0.7	0.11 ± 0.01	89 ± 9	231 ± 17	179 ± 10
GAPux;Rv−/− (17)	9.9 ± 0.9	0.31 ± 0.03	36 ± 6	239 ± 18	204 ± 14

All values are means ± SEM. Numbers in parentheses in the first column give number of rods recorded. Values of r_max (maximum response amplitude) were determined cell by cell from responses to saturating flashes; $S_{F}^{D}$ (dark-adapted flash sensitivity), by dividing the peak amplitude of the mean dim-flash response for each cell by the flash intensity; I_1/2 (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; t_i (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 τ_D (the Pepperberg constant) for dark-adapted rods as described in Materials and methods.

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