Table 2.

Summary of the decay times of the intermediates of the two counterion mutants, recombinant rhodopsin (COS rho) and rhodopsin

Species	Rhodopsin* (T = 12°C)	COS rho† (T = 20°C)	E113D† (T = 20°C)	E113A/A117E† (T = 10°C)
Batho → BSI	120 ns	100 ns	90 ns	<20 ns
BSI → batho	160 ns	190 ns	440 ns
BSI → lumi	150 ns	190 ns	750 ns	190 ns
Lumi → BSI	None	None	None	210 ns
Lumi → meta I-like				2.0 ms
meta I-like → lumi				2.9 ms

The estimated errors of the decay times are 20%. 

^*Values from ref. 11. 

^†Values from ref. 24.