Promega's Cookie Policy

We use cookies and similar technologies to make our website work, run analytics, improve our website, and show you personalized content and advertising. Some of these cookies are essential for our website to work. For others, we won’t set them unless you accept them. To find out more about cookies and how to manage cookies, read our Cookie Policy.

pGEM®-3Zf(+) Vector Technical Bulletin

Instructions for Use of Product(s)
P2271

Literature # TB086

The pGEM®-3Zf(+) Vector is a derivative of the pGEM®-3Z Vector and contains the origin of replication of the filamentous phage f1. The plasmid serves as a standard cloning vector, as a template for in vitro transcription and as a template for production of circular ssDNA. The pGEM®-3Zf(+) Vector contains SP6 and T7 RNA polymerase promoters flanking a multiple cloning region within the alpha-peptide coding region of beta-galactosidase. Insertional inactivation of the alpha-peptide allows recombinant clones to be identified directly by color screening on indicator plates. For induction of ssDNA, bacterial cells with the F´ episome (e.g., JM109, XL-1 Blue, DH5α™) containing pGEM®-3Zf(+) Vector recombinants are infected with an appropriate helper phage. The plasmid then enters the f1 replication mode, and the resulting ssDNA is exported from the cell as an encapsidated virus-like particle. The exported ssDNA can be used for mutagenesis in vitro or can be sequenced using the T7 Promoter Primer or pUC/M13 Forward Primer.

Printed in USA. Revised 11/07.