pUC19 is a commonly used E.coli plasmid cloning vector. It is double stranded with a length of 2686 base pairs. pUC19 carries a multiple cloning site (polylinker) that contains unique sites for 13 different restriction endonucleases (6-cutters). This plasmid also contains an ampicillin resistance marker and can be used for blue/white selection. A complete nucleotide sequence has been determined (see reference). Applications