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Do you have a protocol for Nucleofection™ of parasites?

Yes. You can use our Basic Parasite Nucleofector™ Starter kit for parasitic protozoa. The Basic Parasite Nucleofector Starter Kit (Cat.No. VMI-1001) should help you to determine the optimal program and Nucleofector Solution for your...

Is it more difficult to detect DsRed by FACS than GFP?

Yes, DsRed is much less bright than GFP and is more difficult to detect by FACS and microscopy because it bleaches quickly.

Can I use the pmaxGFP™ control plasmid with insect cells such as S2 cells or SF9 cells?

The pmaxGFP™ Vector provided in our Nucleofector™ Kits is not expressed in insect cells. We strongly recommend an insect expression vector encoding a fluorescent protein or lacZ reporter as a positive control for your experiments [e.g. Novagen™’s...

What are the benefits of Amaxa™ Nucleofection™ over standard electroporation?

One major benefit of the Nucleofector™ Technology is that the nucleic acids are transferred directly into the nucleus enabling the transfection of non-dividing cells and an early analysis of transgene expression (depending on the protein) in as...

Do you have any information regarding differentiation of mouse ES cells after Nucleofection™ with large plasmids?

It is unlikely that plasmid size would affect in vitro differentiation capability. Gene targeting constructs are often as large as 20 kb and if treated well the ES cells are perfectly capable of generating germ line chimaeras afterwards (indicating...

Is there a difference between, for example, the programs C-20 and C-020?

No, the programs C-20 and C-020 are identical regarding their electrical parameters. The letter minus a two-digit number is the nomenclature of the Nucleofector™ I. Since we have launched the Nucleofector™ II we changed it to a letter minus a three...

Why do you recommend 7AAD instead of PI staining for cell determination in mouse macrophages?

The results obtained using 7AAD staining are much clearer than those obtained using PI. Using flowcytrometry stained and unstained, transfected and non-transfected populations can be separated much more easily.

Does the Mouse T cell protocol work for stimulated mouse T cells?

Yes. Stimulate the cells with anti CD3 and anti CD28 antibody for 24 hours. Use the optimized protocol. Often times, this will result in higher transfection efficiency (60-70% is possible). Alternatively, you can stimulate with ConA and IL-2 for 2-3...

How long have you been able to observe GFP expression in primary Human Keratinocytes?

GFP expression has been observed for up to one week as measured by light and fluorescence microscopy.

Do I need a special incubator for cultivation of insect cells ?

Insect cells are cultivated at lower temperatures than E.coli or mammalian cells (S2 cells at 24°C, Sf9 cells at 28°C). Therefore they need a dedicated incubator with appropriate temperature.

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