- PBluescript
In genetics, pBluescript (pBS) or pBluescript II is a commercially available
phagemid containing several useful sequences for use incloning withbacteriophage . The sequences include apolylinker sequence (MCS),antibiotic resistance sequence to ampicillin and an "E. coli " andf1 helper phage origin of replication . The polylinker sequence is located within aLacZ controlledgene designed to provide a blue coloration when expressed in bacteria. This is usually achieved via IPTG found in agarose growth media used to culture bacteria with pBS. If the gene is disrupted by successful insertion of aDNA sequence, the bacteria exhibit a white coloration inBlue white screening , distinguishing successful recombination from those phagemids which were not altered. These recombinant plasmids can then be used in a variety of molecular techniques. Gene expression, genomic library etc are some applications which can be used for the pBS recombinants.The pBluescript cloning system is a product of [http://www.stratagene.com/homepage/ Stratagene] .
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