Table 1.

Equilibrium dissociation constants for binding of UvrA and human NER proteins to TG-51-bp and AAF-50-bp DNA substrates at 30°C^a

Protein	Kd for TG-51 bp (nM)	Kd for AAF-50 bp (nM)
UvrA	24 ± 2	10 ± 1
XPAb	48 ± 4	44 ± 6
XPC/HR23B	18 ± 2	27 ± 3

^aData represent the means ± SD of three experiments.

^bFor XPA the dissociation constants were determined for XPA dimers.