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. 2008 Feb 1;74(7):1988–1996. doi: 10.1128/AEM.01851-07

FIG. 6.

FIG. 6.

Acid induction of citrate transport, citrate metabolism, and diacetyl/acetoin pathways in L. lactis. Proposed pathway for citrate fermentation and C4 compound production. CitP, citrate transporter; CitDEF; citrate lyase complex; AldB and AldC, α-acetolactate decarboxylases; ButA and ButB, diacetyl acetoin reductases (also named butanediol dehydrogenases).