A BIFIDOBACTERIUM BREVE LMC520 STRAIN CONTAINING A PLASMID Pbc520, A METHOD FOR PREPARATION OF CONJUGATED FATTY ACIDS AND FERMENTED MILKS CONTAINING SUCH FATTY ACIDS USING THE SAME STRAIN, AND USE OF A PLASMID pBC520

摘要

Disclosed is a novel Bifidobacterium breve strain LMC520 carrying a cryptic plasmid having an ability to use as a substrate a fatty acid with an unconjugated double bond structure at its carbon chain or an acylglycerol containing the fatty acid, and convert with high efficiency the substrate to a fatty acid with a conjugated double bond structure or an acylglycerol containing the produced fatty acid. In addition, the present invention discloses the use of the cryptic plasmid, a method of producing a fatty acid with a conjugated double bond structure at its carbon chain or an acylglycerol containing the fatty acid by culturing the B. breve LMC520 under anaerobic or aerobic conditions, and a method of preparing a fermented milk containing the fatty acid or the acylglycerol.