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Following Nucleofection®, I cannot obtain stable clones from single cells. What could be the reason?

Some cell lines need certain cell densities to proliferate. For those cells you can try using conditioned medium for setting up limiting dilution or culturing single cells together with feeder cells.


My suspension-adapted HEK293 (or CHO) cells tend to clump in culture. How can I avoid this?

Efficient protein production experiments require growth of the host cell in single-cell suspension, something that is sometimes difficult to achieve since most established cell lines retain their adherent growth characteristics. Commercially...

What antibiotic concentration should I use for selecting stable transfectants?

We highly recommend to perform a titration for G418 in a range of 0,1 mg/ml to 1,5 mg/ml; in serum-free culture expand range down to 20 µg/ml).Choose the concentration which is 0,1 or 0,2 mg/ml above the one which shows complete cell death as...

Are there any contaminating glial cells in your Clonetics rat or mouse embryonic neuronal cells?

There will be a small amount of glial cells in the culture, these are not considered a contaminating cell type. The glial cells are necessary to help the neurons form their axons and dendrites, synchronize the activity of the axons, and remove...

How can I improve Human Hepatocyte viability post Nucleofection on the 96-well Shuttle device?

In addition to proper cell handling and using culture media optimized for long term culturing of hepatocytes (Lonza Basal medium supplemented with BulletKit), we recommend separating the healthy hepatocytes from the dead cells and debris in the...

Do your Clonetics Rat and Mouse Astrocytes proliferate?

Yes. The cells do expand in culture.

How much DNA should I use in my Nucleofection® Reaction to obtain stable clones?

You should use the amount of DNA recommended in the optimized protocol for transient transfection. If obtaining a very high number of clones is important for your experiments, you can try increasing the amount of DNA. For further tips see our...

What is the best way to centrifuge Human Hepatocytes prior to Nucleofection?

In order to avoid cell compaction in the pellet and difficulties in cell resuspension, we recommend using round bottom 2 ml vials or 50 ml BD Falcon™ tubes for all centrifugation steps prior to Nucleofection™.

What age are the mice and rats that your Clonetics Mouse and Rat Astrocytes are isolated from?

They are embryonic. The rats are E18 or E19 and the mice are E14 or E15.
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