Fig. (3)
Interatomic distances (D) between different atoms of Glu181 and the PSB nitrogen (
a
), Ser186 and the PSB nitrogen (
b
), Glu181 and Ser186 (
c
), Glu113 and Ser186 (
d
), Glu113 and Glu181 (
e
), Glu113 and the PSB nitrogen (
f
) in wild rhodopsin.