Table 2.

Heuristic fits of UV, blue and green classes

Class log fit	λ 1,log (nm)	δ 1 (nm)	ε 1	a 2/a 1	λ 2 (nm)	δ 2 (nm)	n	Fit range	λ 1,lin − λ 1,log (nm)
UV	343 ± 2	85 ± 5	0.08 ± 0.07				13	300–440	1
V	426 ± 8	78 ± 6	0.33 ± 0.10				4	300–500	0
nB	458 ± 5	36 ± 6	0.19 ± 0.24	0.18 ± 0.05	366 ± 10	152 ± 22	5	300–500	−2
nG	567 ± 5	85 ± 3	−0.02 ± 0.05	0.08 ± 0.02	364 ± 4	92 ± 9	9	300–680	0
bG1	552 ± 3	111 ± 3	0.00 ± 0.04	0.05 ± 0.01	351 ± 4	95 ± 12	10	300–680	2
bG2	550 ± 4	96 ± 3	−0.03 ± 0.04	0.01 ± 0.00	349 ± 13	148 ± 62	10	300–680	5
Rh560	558	112	0.12	0.25

The ranges of estimators are given as 95% confidence intervals. The last line shows a fit to a rhodopsin template peaking at 560 nm