Confirmation of BTH interactions by β-Galactosidase activity assays. The interaction is significantly stronger between Bd3125 and the N-terminal domain of Bd1971 than the interaction with the C-terminus of Bd1971. The response regulator domain of Bd0367 showed significant interaction with Bd1971, but the full length Bd0367 did not. *p>0.05 by Student's t-test N/S- not significant. Data are from at least three independent experiments, error bars are the standard error of the mean 