Table 1.

Summary of the λ_max values and shifts relative to parent pigment spectrum (in parentheses) in nanometers and in cm⁻¹ (bottom lines) of the intermediates of the two counterion mutants, recombinant rhodopsin (COS rho) and rhodopsin

Species	Rhodopsin*	COS rho†	E113D†	E113A/A117E†
Pigment	498 20,080	500 20,000	509 19,646	490 20,408
Batho	529  (+31) 18,904  (1,176)	531  (+31) 18,832  (1,168)	540  (+31) 18,519  (1,127)	525 (+35) 19,048 (1,360)
BSI	477  (−21) 20,964  (884)	479  (−21) 20,877  (877)	495  (−14) 20,202  (556)	453 (−37) 22,075 (1,667)
Lumi	492  (−6) 20,325  (245)	490  (−10) 20,408  (408)	486  (−23) 20,576  (930)	482 (−8) 20,747 (339)
Meta I	NA	NA	NA	466 (meta I-like) 21,459 (1,051)

The estimated errors of λ_max values are ±2 nm, except for E113A/A117E-batho and bsi where they are ±4 nm. Values in parentheses are spectral shifts of the intermediates relative to the dark state parent pigment spectra. NA, not available. 

^*Values from ref. 11. 

^†Values from ref. 24.