丙酸菌對(duì)糖類進(jìn)行無氧的產(chǎn)生丙酸的發(fā)酵。作為丙酸的產(chǎn)生途徑，認(rèn)為是經(jīng)過由糖開始的艾姆登-邁耶霍夫途徑所產(chǎn)生的丙酮酸，而丙酮酸則有如下的變化：

　　平衡：CH₃COCOOH＋4H-→CH₃CH₂COOH＋H₂O

　�。�1）methylmalony-CoA Coboxytransferase

　�。�2）malate dehydrogense

　�。�3）fumarase

　�。�4）succinate dehydrogenase

　　（5）proptonate dehydrogenase

　�。�6）methylmalonyl-CoA mutase

　�。�7）methylmalonyl-CoA racemase