salmon sperm DNA

Bernard Murray bernard at
Mon Dec 30 11:46:21 EST 1996

In article <32C2AB07.64CD at>, 
mathu at says...

>As for adding this as a carrier during (mammalian?) cell tranasfections,
>again you can avoid the stuff. Supercoiled or linearized plasmid DNA
>works just fine without the carrier stuff. You have to normalize your
>transfection efficiencies using a second reporter construct anyway.

I beg to differ.  I've been trying to obtain efficient transfection of
a neuroblastoma cell line and have given it my best shot with CaPO4 and
lipofection methods.  Electroporation showed some promise and I spent
some time performing the normal optimisation for capacitance, voltage,
DNA concentration, cell density and electroporation temperature.  I saw
the biggest boost in efficiency when I included carrier DNA.  I realise
that this is not needed for all cell lines but in this case it pushed
the efficiency up to a usable level.

See Chu et al. (N.A.R. 15, 1311-1326 [1987]) for the methodology.


Bernard Murray, Ph.D.
bernard at (National Cancer Institute, NIH, Bethesda MD, USA)

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