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. 2008 Apr 4;190(11):3940–3947. doi: 10.1128/JB.00086-08

FIG. 3.

FIG. 3.

TonB-dependent growth stimulation by norepinephrine. B. bronchiseptica strains B013N (tonB+), BRM31(pBBR1MCS-1) (tonB::pSSt2), and BRM31(pBB41) (tonB::pSSt2/tonB+) were used. B. bronchiseptica cells were grown in iron-replete medium (solid bars) or iron-depleted medium supplemented with either 200 μg/ml transferrin (shaded bars) or 200 μg/ml transferrin and 50 μM norepinephrine (open bars). Growth yields were measured densitometrically after 40 h of incubation. Values represent means ± 1 standard deviation (error bars) from triplicate cultures.