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. 2015 Jul 28;6:780. doi: 10.3389/fmicb.2015.00780

FIGURE 4.

FIGURE 4

Anaerobic and aerobic formation of 2,3-butanediol via acetoin involves acetolactate synthase and decarboxylase encoded by the alsSD operon. The alsS insertion mutation abolishes synthesis of 2,3-butandiol (Renna et al., 1993; Cruz Ramos et al., 2000).