• 1 April 1975
    • journal article
    • Vol. 29 (4), 546-8
Abstract
Five plasmids, distinguishable by their molecular weights (10(6), 2 x 10(6), 5 x 10(6), 10(7), 3 x 10(7), respectively) were isolated from Streptococcus lactis C2. A spontaneous proteinase-negative derivative of this strain lacked the 10(7) plasmid.