Intracellular multiplication in RAW 264.7 macrophages of BAB-parental and the mutants BABΔfbpΔglpX, BABΔpckA, BABΔppdK, BABΔpckAΔppdK, and BABΔmae (the virB mutant is an attenuated mutant used as a control). Values are means ± standard errors for triplicate infections, and the results shown are representative of three independent experiments.