myTXTL – Cell-Free Expression
myTXTL T7 Expression Kit
Optimized for cell-free gene expression from T7-driven templates, either linear or circular DNA.

The myTXTL® T7 Expression kit is based on our LS70 Master Mix technology utilized in the myTXTL Linear DNA Expression Kit, and has been engineered for maximum robustness and reliable performance when using T7 promoter-driven constructs. This all-in-one solution contains a P70a-T7rnap HP plasmid which delivers continuous production of T7 RNA polymerase in addition to an E. coli-based master mix containing the cellular machinery, energy buffer, and amino acids premixed for in vitro protein production in a single tube. Simply start protein synthesis by adding a DNA template containing a T7 promoter. A positive control plasmid with one of our highest expressing green fluorescent proteins (GFP) is included in the kit for easy confirmation of proper protein synthesis conditions.

As in vitro protein synthesis in the myTXTL cell-free system relies on the endogenous primary sigma factor 70 (σ70) of E. coli, a σ70-specific promoter is used to drive expression of T7 RNA polymerase in the myTXTL T7 Expression kit. This co-expression of the P70a-T7rnap HP plasmid delivers continuous expression of T7 RNA polymerase for robust gene expression from traditional T7 expression system constructs.

  • All-in-one Solution – Simply mixing template DNA and ready-to-use myTXTL Master Mix.
  • High-throughput screening – Process more samples within a single experiment.
  • Various inputs – Start from linear or circular DNA templates.
  • Highly Controllable – Easily adjust experimental parameters.
Ordering Information
Size
Cat#
Qty
Price
myTXTL T7 Expression Kit
myTXTL T7 Expression contains LS70 Master Mix, pTXTL-P70a-T7rnap HP plasmid pTXTL-T7p14-deGFP HP control plasmid
505024
$365
pTXTL-P70a-T7rnap HP
High purity, ready-to-use plasmid sufficient for 24 Rxns (15uL, 2.4nM) or 96 Rxns (50uL, 2.4nM).
502134
$65
pTXTL-T7p14-deGFP HP
High purity, ready-to-use plasmid enough for 10 Rxns (25uL, 24nM).
502136
Available and in-stock for immediate shipment.
Kit Contents

Each kit contains LS70 Master Mix, P70a-T7rnap HP plasmid, and positive control plasmid.



Overview

Utilizing Existing T7 Constructs

Arbor Biosciences understands many organizations have large collections of genes already cloned into traditional T7 expression system constructs for classic E. coli expression. We created the myTXTL T7 Expression kit specifically for these individuals in order to deliver rapid analysis of gene expression from existing libraries. As the system can express numerous constructs simultaneously, the co-expression of P70a-T7rnap in no way hinders the expression of T7 promoter driven constructs and also allows for multiple T7-driven plasmids or linear DNA templates to be co-expressed in the system at once.

Fig 1. Continuous Expression of T7 RNA Polymerase. A T7 RNA Polymerase plasmid is co-expressed with a T7 promoter driven deGFP construct to generate a two-gene transcriptional cascade.

Gene Circuits

For your convenience, Arbor Biosciences offers a large collection of over one hundred pre-designed plasmids, including T7 promoter driven constructs, for setting up complex gene circuits with the myTXTL Toolbox 2.0 Plasmid Collection.

Contact us to learn about options to customize reaction sizes and bulk packaging formats.

Performance
Fig 2. Protein synthesis in myTXTL using the T7 expression system. deGFP expression under the control of the bacteriophage T7 promoter (PT7) is facilitated by initial expression of T7 RNA polymerase from an additional plasmid.
Publications

Please let us know when you have published using the myTXTL T7 Expression kit, and we will be happy to list it on this page. For a growing list of publications with other products in the myTXTL portfolio, please visit our Publications page. Thank you!

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