TABLE 2.

K_d values for AgrA binding to the P2 and P3 promoter constructs of the RNAIII-agr intergenic region^a

Parameter	Values (nM) for AgrA binding to:
	P2 without acetyl phosphate	P2 with acetyl phosphate	P3 without acetyl phosphate	P3 with acetyl phosphate
Kd1	0.23 ± 0.04	NA	0.75 ± 0.05	NA
Kd2	3.8 ± 1.6	0.16 ± 0.03	2.2 ± 0.8	1.7 ± 0.3

^aK_ds are listed in order of increasing size of the protein/DNA complex. Data shown are averages of two determinations. NA, not applicable.