Table 1.

Binding and photorepair properties of WT and mutants of Xl64

Enzyme	K d (nM)	Obtained ηss	Ideal ηssa
WT	30 ± 3	5.0%	4.9%
Q407A	45 ± 6	5.6%	5.5%
R410A	71 ± 6	1.3%	5.5%
R410K	14 ±1	5.1%	5.0%

^aEstimated by using η₁ = 6.7%, η₂ = 83%, k_x = 0.01 s^–1 and respective k_exc, as described previously⁹.