Cloning and Transformation with Plasmid Vectors.

Plasmids occupy a place of honor in molecular cloning: They were used in the first recombinant DNA experiments and, 40 or more years later, they remain as the carriage horses of molecular cloning. After almost half a century of sequential improvement in design, today's plasmid vectors are available in huge variety, are often optimized for specific purposes, and bear only passing resemblance to their forebears. Here, various features of plasmid vectors and methods for transforming E. coli cells are introduced.
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