Cobyric acid salvaging by the cobD mutant is restored by exogenous EA-P but not by l-Thr-P. Cbl-dependent growth of serovar Typhimurium strains was assessed in minimal medium supplemented with glucose, Cby, and DMB. The genotypes described in the figure correspond to the strains as follows: JE2216, cobD; JE6045, cobD/pT7-7; JE8836, cobD/pCbiBWT; TR6583, cobD+. Plasmids were introduced into strain JE2216 (cobD); plasmid pCBIB4 encoded pCbiBWT.