title: Plasmid distribution and evidence for a proteinase plasmid in Streptococcus lactis C2-1.
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.
mesh_terms: D002499:Centrifugation, Density Gradient; D004269:DNA, Bacterial / Q000032:analysis; D004270:DNA, Circular / Q000032:analysis; D010450:Endopeptidases / Q000096:biosynthesis*; D005111:Extrachromosomal Inheritance; D013294:Lactococcus lactis / Q000032:analysis* / Q000201:enzymology; D008854:Microscopy, Electron; D008970:Molecular Weight; D009154:Mutation
chemical_list: D004269:DNA, Bacterial; D004270:DNA, Circular; D010450:Endopeptidases