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pSF-T7-T7_Term (OG177) T7 Single Terminator Plasmid

Description

T7 expression plasmid with the T7 terminator signal downstream. The bacterial and mammalian terminators (in most our plasmids) are removed.

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OG177R1
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$232.32
OG177C1
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$2,560.00
OG177G1
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$6,400.00
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Plasmid Info

Product Name: pSF-T7-T7_Term

Product Code: OG177

Size (bp): 3449 bp

Bacterial Antibiotic Selection: KanR

Origin and Compatibility: pUC high copy derived from pBR322

Bacterial Copy Number: 500-700 per cell

Promoter: T7 Polymerase Promoter

Plasmid Purpose:

This vector allows transcription of RNA using the T7 bacteriophage polymerase. If you using an in vitro transcription kit the RNA produced from this vector will be uncapped and poly-adenylated making it unsuitable for mammalian cells however some kits are available that will add these features. This plasmid can also be used for inducible gene expression in bacterial cell lines that express the T7 polymerase.

This vector contains the T7 terminator only whereas most of our vectors contain mammalian T7 and bacterial termination signals together. This plasmid is normally only used if the presence of the mammalian and bacterial terminators is undesirable.

This vector can also be digested at a restriction site that is 3 prime to the end of your gene to allow run-off of the polymerase rather than exploiting the hairpin T7 terminator. If you are expressing your gene in a Vaccinia virus-free mammalian T7 system it will require an IRES upstream of your gene because of the absence of a 5 prime cap on the RNA produced please see OG85: pSF-T7-EMCV if this is required.

Sequence and Map
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Other Info
Transcription Termination:

This plasmid contains the T7 terminator to allow transcription termination. Unlike most of our other plasmid products which contain three terminators for different organism types this vector only contains the T7 terminator. This plasmid is only normally used when the presence of the other two terminators normally in our vectors is not desirable or space restrictions in a given biological system are important.

Cloning
Cloning in a Gene:

This plasmid has been designed to be compatible with a range of cloning techniques. The multiple cloning site contains a range of standard commonly used restriction sites for cloning. Using these sites genes can be inserted using standard cloning methods with DNA ligase. Other methods such as ligase independent cloning (LIC) Gibson Assembly InFusionHD or Seamless GeneArt can also be used and because all of our plasmids are based on the same backbone the same method can be used for cloning into all of our catalogue vectors.

Multiple cloning site notes:

There are a few important sites within the MCS. These include the NcoI site the XbaI site and the BsgI and BseRI sites. The NcoI site contains a start codon that is immediately downstream of both a Kozak and Shine-Dalgarno ribosomal binding site. These allow for optimal positioning of genes when the start codon is placed in this location. If this is not required and you wish to use a downstream site for gene cloning you can remove the NcoI site by cleaving the plasmid with KpnI.

The XbaI site contains a stop codon. This stop codon is positioned in a specific position in relation to the BsgI and BseRI sites that are immediately downstream. When either BseRI or BsgI cleave the plasmid they produce a TA overhang from the stop codon in the XbaI site that is compatible with all of our peptide tag plasmids cut with the same sites. BseRI and BsgI sites are non-palindromic and cleave a defined number of bases away from their binding site.

Whenever we clone a gene into our multiple cloning site we always position the start and stop codon in the same positions in the MCS. If the start and ends of the genes are not compatible with NcoI and XbaI we extend the sequence to the nearest external sites but keep the start and stop codons locations consistent.

IP Status
Intellectual Property Status

This product is part of our SnapFastâ„¢ plasmid range, for more information on the intellectual property status of this plasmid and the terms of our licences please click here.

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