pER16载体 BioVector NTCC质粒载体菌种细胞基因保藏中心

pER16载体

In a survey of 35 strains of Streptococcus thermophilus, 13 strains were found to harbor plasmid DNA.
Most of these strains contained plasmid species varying in size from 2.2to 7.15 kilobases. Only three strains
had more than one plasmid species. Each of the nine distinct types of plasmid DNAs identified had two or
more unique recognition sites for restriction endonucleases. The characteristics of the indigenous cryptic
plasmids of S. thermophilus may allow their development as cloning vectors useful in the genetic engineering
oq' this species and other streptococci that are important in food production


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