FIG. 3.

Growth of S. enterica strain BE121 (pduO cobA) on 1,2-propanediol minimal medium supplemented with either AdoCbl or CNCbl. □, 2 μg of CNCbl/ml; ■, 0.2 g of AdoCbl/ml; ◊, 2 μg of AdoCbl/ml; ○, 20 μg of AdoCbl/ml. Strain BE121 did not grow with CNCbl at concentrations from 0.2 to 20 μg/ml (not shown). The cells were cultured as described in Materials and Methods. OD₆₀₀, optical density at 600 nm.