The production of equol by mixed culture fermentation of Streptococcus faecium and Enterobacter
Equol that has many bioactivities is the decomposition product of isoflavones by microbiota in colon.An anaerobic Streptococcus BY-1 that produces equol from isoflavones was obtained.The experiment was conducted to study the influence on growth and metabolism of Streptococcus faecium BY-1 by Enterobacter BY-2 and the relationship between BY-1 and BY-2.It is certified that BY-2 can stimulate BY-1 to produce acid and equol when they were inoculated by 1:1.The various enzymes,organic acid,hydrogen produced by BY-2 play an important role on growth of BY-1.The relationship between BY-1 and BY-2 is called metabiosis.We can utilize this relationship to develop new-typed and hygienical sanitarian milk.