Fig. 3From: High copy number and highly stable Escherichia coli–Bacillus subtilis shuttle plasmids based on pWB980Plasmids copy number and segregational stability. a As shown in the graph, all the new plasmids obtained higher copy numbers than pWB980 except pUC980-7 and plasmid pUC980-8 was not counted because it was unreplicapble in B. subtilis cells. b plasmids were classified into three groups from high to low, concerning their copy numbers (C1 to C3) and segregational stabilities (S1 to S3)Back to article page