TABLE 2.

Relative binding of DNA targets for TcpP⁺ and TcpP⁻ membrane preparations

Targeta	mg protein/ml required for a 50% shift
	TcpP− (TG389)	TcpP+ (TG387)
Parental	0.526	0.177
−56	0.548	0.182
−55	0.526	0.179
−54	0.578	0.233
−53	0.589	0.239
−52	0.589	0.376
−51	0.570	0.373
−50	0.620	0.154
−49	0.685	0.358
−48	0.586	0.208
−47	0.636	0.193
−46	0.649	0.182
−45	0.637	0.197
−44	0.585	0.193
−43	0.610	0.148
−42	0.648	0.220
−41	0.617	0.252
−40	0.622	0.400
−39	0.677	0.173
−38	0.610	0.332
−51, −40	0.692	0.533
−49, −38	0.698	0.527
−51, −49, −40, −38	0.676	0.515
−50, −39	0.676	0.167

^aNumbers represent the positions of transversion substitutions, relative to the toxT transcription start site. Direct repeat elements (wild-type nucleotides TGTAA) are from positions −53 to −49 and −42 to −38.