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Passage number

Discussion of all aspects of cellular structure, physiology and communication.

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Passage number

Postby Silverpixie07 » Thu Aug 01, 2013 12:32 am

Hi,
I was told that a cell line once frozen and then thawed out gets "re-clocked", that is their passage number go back to 0. This is all very confusing? Can anyone please comment on this.
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Postby jwalin » Fri Aug 30, 2013 2:26 pm

Hi,

There are different opinions about this but primarily it depends on the cells that you are growing. In differentiated cell lines the cells wont get reclocked at all.
In the lab I work in, we dont consider that the cells can be reclocked.

The best way of labelling would be labeling the cell lines as P x + y (where x is the passage number of the cells when they have been frozen and y is the current passage number), for e.g. P 2 + 6.

Hope this helps.
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