Actin expression in protein extracted from tissue

Peter Ellis via (by pjie2 from
Thu Apr 2 17:31:42 EST 2009

DK wrote:
> In article <mailman.722.1238689793.13724.methods from>, "Kamalian, Laleh" <L.Kamalian from> wrote:
>> Hi, I have encountered a few problems after extracting protein from tissue =
>> sections.  The tissue sections I used were primary tumour sections produced=
>> in mouse using sub-coetaneous injection of a lung malignant cell line. The=
>> sections were kept in RNA-later solution for 48 hours, 
> Since you are using a solution for which composition is unknown, 
> it is impossible to say what might have happened to the cells/proteins
> in your samples during the storage... 

RNALater is largely an extremely concentrated ammonium sulphate 
solution.  It preserves RNA by precipitating out the RNAses in the 
tissue.  Without knowing the composition of your lysis buffer, it's hard 
to say whether you would have re-solubilised the actin in the sample.


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