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What method can I use to fix my HL-60 cells as shown in your optimized protocol?

The cells which are shown in the HL-60 optimized protocol are living cells and not fixed cells. However a good method for fixation of GFP is to use 3.5%-4% Paraformaldehyde in PBS. Please keep in mind that the fixation method is dependant on what...

Why is the Nucleofector Technology ideal for protein production from stable clones ?

The generation of a stable clone often requires six months or more due to selection procedures and adaption to serum-free conditions after transfection. With the help of the Nucleofector technology suspension cells can be transfected directly in a...

Is your pmaxGFP control vector supplied with the Nucleofector Kits suitable for stable expression?

No. This vector is only supplied in our Nucleofector™ Kits as a positive control and cannot be used for selection because it does not contain a mammalian selection marker. The only resistance gene expressed by this vector is kanamycin which is only...

How many cortical neurons can I expect from a single pup?

According to QBM Cell Sciences, you can expect 12 million cortical neurons from an average E18-E19 rat pup. You can expect 4 million cortical neurons from an average mouse pup.

Do you have any recommended methods for detaching human monocytes from the plate for assaying or before Nucleofection?

We have had good results by incubating the cells in ice cold PBS for 10 minutes and then rinsing the plates. Alternatively, the cells can be detached without a medium change by gently pipetting the cell suspension up and down. Our experience has...

Does the 96-well Shuttle recognize if the cuvette plate is in backwards?

No, it does not recognize the orientation of the plate. Please make sure that well A1 is positioned in the upper left corner of the retainer.

Do any of the three instruments used in the 96-well Shuttle System "go to sleep" or power off automatically?

The energy options of the laptop are set as such that only the screensaver is activated, the harddisk won't turn down and hibernation is disabled. One can change these settings via the system control. However this is not recommended because by...

Are your Nucleofector Solutions checked for RNase activity during your QC process?

Yes. We do test the Solutions with a real time RT-PCR based assay. This assay basically measures the quantity of an RNA template after incubation in our solution. In case there is RNAse contamination the template would be digested which would be...

Is there a reason why in our Nucleofector Protocols for Primary Human Chondrocytes we include FCS in the pronase and collagenase solutions for preparation of chondrocytes?

Yes, even though this may sound odd since serum is generally known to inactivte proteases. We recommend it in this case, however, because the incubation times are quite long and the cells are stressed by the procedure. The amounts of enzymes should...

What is the molecular weight of your control pmaxGFP plasmid?

The molecular weight is approximately 2.3x10e6 g/mol based on the average MW of a base pair being 660 g/mol.
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