VITAMIN B12-PRODUCING E. COLI STRAINS AND PROCESS FOR THE PREPARATION OF VITAMIN B12 BY CULTURE OF THESE STRAINS.

摘要

P The invention relates to E.Coli strains producing vitamin B12 transformed by a heterologous DNA comprising all or part of the cob1 region and allowing the expression of said region in E.Coli. In particular, the cob1 region is the region of Salmonella typhimurium. /P