Table 1. Apparent dissociation constants for UvsX binding to dsDNA or ssDNA^a.

Other Ligands Present	Apparent Kd (nM)
	dsDNA	ssDNA
None	46±18	Not boundb
ATP	170±60	760±140
ATPγS	230±50	740±90
ATP+homologous ssDNA	1050±300
ATP+heterologous ssDNA	N.D.c
ATP+homologous dsDNA		≤750d

^aEquilibrium binding data derived from Figures 2, 3, 4, and 6.

^bNo binding observed under the experimental conditions used.

^cNot Determined. Measuring the apparent K_d for dsDNA in the presence of ATP and heterologous ssDNA requires unattainably high protein concentrations.

^dBased on observation in Figure 4 that homologous dsDNA does not destabilize UvsX-ssDNA interactions.