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. 2015 Nov 13;81(24):8294–8306. doi: 10.1128/AEM.02059-15

FIG 3.

FIG 3

Analyses of cell-free supernatants of R. erythropolis strain MI2 and transposon-induced mutants in MSM with 30 mM DTDB and 0.5% (wt/vol) sodium gluconate. (A) Detection of the degradation intermediates of 4MB. (B) Because 4-oxo-4-sulfanylbutyric acid is not commercially available, it could not be used as a control, as a standard, or for calibration. Therefore, detection of this compound is shown as the “peak area” depending on the respective signal intensity.