Info

\

/ ljr.

malate2

malate2-

lactate-

malate2-

lactate-

malate2-

malate2-

Figure 10-5. Malate transport in wine lactic acid bacteria. Transport of malate by Oenococcus oeni is mediated via a uniport malate permease (A). The accumulated malate is then decarboxylated directly to lactate by malolactate enzyme (ME); lactate efflux occurs via passive diffusion. The malolactic reaction also consumes a proton, such that the cytoplasm becomes more alkaline and more negatively charged. Thus, the electo-chemical gradient across the membrane (the proton motive force) is increased, and ATP is conserved. In lac-tobacilli and lactococci, a similar process occurs (B), except that malate permease acts as an antiporter, such that lactate efflux drives malate uptake. Adapted from Konings, W.N. 2002.

Brew Your Own Beer

Brew Your Own Beer

Discover How To Become Your Own Brew Master, With Brew Your Own Beer. It takes more than a recipe to make a great beer. Just using the right ingredients doesn't mean your beer will taste like it was meant to. Most of the time it’s the way a beer is made and served that makes it either an exceptional beer or one that gets dumped into the nearest flower pot.

Get My Free Ebook


Post a comment