Table 5.

Values of model parameters that best simulate photocurrents in dark-adapted bass single cones: Response to 2-s steps of light

	Parameter	Categorya	Units	Cone 4			Mean ± SD
VP*	VP*/s	Statistical	VP*/s	50	1,975	41,466	Fig. 7
	${\gamma }_{max}$	Adjustable	µM/s	95	95	40
T*	${\Psi }_0$	Adjustable	1/s	250	250	250	237 ± 31
PDE*	${\beta }_{sub}$	Adjustable	µM/s per molecule	0.239	0.239	0.239	e0.366 ± 0.101
	${}^{\mathit{init}}\alpha _{\mathit{PDE}}$	Adjustable	1/s	2.7	2.8	—	Fig. 7
	${}^{\mathit{final}}\alpha _{\mathit{PDE}}$		1/s	—	7.8	55
	$k_{{\alpha }_{\mathit{PDE}}}$		1/s	—	10	—
Ca2+ influx	$K_{HA}$	Adjustable	µM	0.12	0.12	0.12	0.085 ± 0.024
	$C_{HA}$	Adjustable	µM	31.4	31.4	31.4	26.4 ± 9.3
	B	Adjustable		15	15	15	11 ± 3.3
Ca2+ efflux	$J_{Ca}^{\max }$	Statistical	pA	3.89	3.89	3.89	3.96 ± 0.9
	${{\displaystyle K}}_{Ca}^{exc}$	Adjustable	µM	0.030	0.030	0.030	0.025 ± 0.006

Mean ± SD; n = 10 cones.

^aValues of invariant parameters first used to compute dark and flash photocurrents are not repeated here. They have the same values listed in Table 2.