Restoration of FlaA production by the complementation of an HP0958 mutant is promoter dependent. Lane 1, Protein marker; lane 2, the CCUG17874 wild-type strain; lane 3, the CCUG17874-hp0958 KO; lane 4, the P79 wild-type strain; lane 5, the P79-0958 KO; lane 6, P79-0958/pIR203K04; lane 7, P79-0958/pIR1041; lane 8, P79-0958/pIR1186; lane 9, P79-0958/pIR1563.