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(A) Log10 expression ratios for PhoB-regulon members from wild-type and ΔphoB experiments. (B) Log10 expression ratios for Fur regulon members from wild-type and Δfur experiments. Left: regulon members with significant expression differences (P-value ⩽0.05); right: regulon members with non-significant expression differences (P-value >0.05). Expression ratios are 1% isobutanol/0% isobutanol.
