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I want to stimulate Human T cells post Nucleofection. Are there any precautions to keep in mind?

After Nucleofection™, wait at least four hours before stimulation. Stimulating immediately after Nucleofection™ may lead to increased cell mortality and poor activation of cells. For more details on the stimulation of Human T cells post...

What stock concentration of Propidium Iodide does Lonza use for FACS analysis?

We use a stock concentration of 100 µg/ml in PBS. This is diluted 1:300 – 1:400 into the sample.

Is it possible to get neomycin resistant clones after Nucleofection with pmaxGFP?

The pmaxGFP control DNA is not suitable for making stable clones because it lacks a selectable marker for mammalian cells. The kanamycin resistance expressed by this plasmid is only suitable for bacterial selection.

Where can I find the expiration dates for the Nucleofector Kit and the Nucleofector Solution?

The expiration dates are located on the outside label of the kit box and on the label of the solution box.

My Nucleofector Solution was frozen. Is this a problem?

As long as the supplement was not added to the Nucleofector™ Solution, then there is no risk of any damage to the solutions. Even long-term storage of several months did not alter the performance of the Nucleofector™ Solution. However, if the...

I have a GFP construct that I use and usually get anywhere from 50-80% GFP positive cells using FACS analysis while I get only 30-40% using a GFP-NFAT fusion protein driven by the same promoter. Do you have any suggestions?

The Amaxa™ Nucleofection™ Conditions are optimised for each cell type, the solutions and programs are cell type dependent and not vector dependant. The expression of the fusion protein depends on the localization of the protein transcription,...

I currently work with some adherent cell lines, such as 293, which are grown in DMEM media. I have noticed that the mortality seems to be high after Nucleofection. Do you have any recommendations?

For some adherent cell lines we strongly recommend using RPMI instead of DMEM medium. As described in culture conditions of the cell line optimization kit protocol as well as the NIH3T3 (DSMZ) protocol, using RPMI instead of DMEM as "transfer and...

Do you have any siRNA Nucleofection results using concentrations lower than 50nM?

Yes. Please click on the attached Technical Reference Guide: "Designing an RNAi Experiment Using Nucleofection™". On page 3 you can find a table with some examples.

Can I use the Nucleofector Technology for RNAi applications? How do I start?

Yes. The Nucleofector™ Technology can be easily applied for any RNAi substrate (siRNA, shRNA, miRNA). You can use the same conditions described in the cell type specific Optimized Protocol for DNA vectors (cDNA, shRNA or miRNA expressing plasmids)...

The animal facility which isolates my hepatocytes is at a different location, should I be concerned about transport time?

Isolated hepatocytes can be transported in Krebs-Henseleit Buffer or supplemented William's E Medium. Long transport time for isolated hepatocytes, (in excess of one hour) can cause a decrease in efficiency of Nucleofection™, but does not seem to...