Using linear DNA templates greatly increases the speed of the design-build-test-learn cycle as laborious steps like cloning, transformation and purification are no longer necessary. This is particularly useful when working with a high number of variants of a single protein that need to be studied and validated. The reduced costs of linear DNA can also expand the sampled sequence space for protein designs compared to the plasmid format.

deGFP is a N- and C-terminally truncated version of the reporter eGFP that is more translatable in cell-free systems. The excitation and emission spectra as well as fluorescence properties of deGFP and eGFP are identical which enables the use of commercial eGFP protein to be used in a standard curve to quantify the deGFP in the reaction.

The myTXTL Linear DNA Expression Kit is based off our myTXTL Sigma 70 Master Mix Kit, but has been further engineered to efficiently produce soluble and membrane proteins using linear DNA templates without the need for nuclease inhibitors like GamS. Simply add linear DNA template to the optimized master mix to begin protein synthesis.

All P70 promoters originate from the lambda phage promoter for the repressor Cro with its two operator sites and are specific to the E. coli sigma factor 70. They differ in strength (P70a > P70d > P70b > P70c) due to mutations that were introduced at -35 and/or -10 regions.

We recommend setting the myTXTL GamS Protein concentration in a myTXTL reaction at 10 uM (myTXTL GamS stock solution is provided at 150 uM).

Yes. Due to the manufacturing process, there might be a small pellet visible. It is critical that you resuspend this pellet back into the myTXTL Master Mix completely before aliquoting it to set up your myTXTL reaction(s).

Yes, myTXTL Linear DNA Expression Kit allows the use of both, linear and circular/plasmid templates.

Sample handling and storage is mainly determined by the stability of your molecule of interest (protein, DNA, RNA) and thus optimal conditions may need to be evaluated. But to ensure sample integrity, we would recommend to either process the myTXTL reaction immediately after performing the incubation or store it at ≤ -20 °C.

Limit the number of freeze-thaw-cycles as much as possible. Our studies have indicated that up to five freeze-thaw-cycles do not negatively influence protein production efficiency of the myTXTL Master Mix when using flash freezing in liquid nitrogen and subsequent -80C storage.

Yes, please see examples in the Publications section; filter for myTXTL. Please note, that every gene circuit should start with a σ70-specific promoter like P70a.