Plasmid pBUL1 derived from a lactobacillus and derivatives thereof

摘要

Disclosed is the plasmid pBUL1 having a restriction endonuclease cleavage map as shown in FIG. 1 and having a length of about 7.9 kbp and its derivatives. The plasmid was isolated from Lactobacillus delbrueckii subsp. bulgaricus M-878. The plasmid is useful as a vector for breeding various microorganisms such as lactic acid bacteria, and the derivatives thereof are useful also as a shuttle vector.