TABLE 4.

Effect of ChvE concentration on induction of virB::lacZ

Straina	β-Galactosidase (U) obtained with inducing compoundsb:
	HAP	HAP + arabinose	HAP + glucose
A136(pGP159)	7 ± 1	238 ± 10 (33)	18 ± 1.5 (2)
A136MX1(pGP159, pWT122)	8.7 ± 1.2	206 ± 6 (24)	243 ± 0.5 (28)
C58ΔvirA(pGP159)	8.6 ± 1.4	363 ± 21 (42)	60 ± 3.7 (7)
At11058(pGP159, pWT122)	6.7 ± 1.0	384 ± 8 (57)	385 ± 3.6 (58)

^a A136MX1 is A136 with a Tn5 insertion in the chvE gene. At11058 is C58 with mutations in chvE and virA. pWT122 directs the constitutive high expression of the chvE gene. 

^b Data are means ± standard errors of the means for three samples. The numbers in parentheses are the fold increases in induction calculated from the values with HAP alone. HAP was used at 250 μM. Arabinose and glucose were used at 10 mM.