MW of PVP inDenhardts?

[Thibaud Le Mouel]

>Hello,
>I am trying to determine what is the correct molecular weight of
>Polyvinylpyrrolidone used in Denhardts solution.  Does it really matter?  We
>have at least 3 different sizes on the shelf.  I've looked in Maniatis, the
>MGH "Red book" and a couple of other places and they all just call for PVP,
>but do not give a size preference.  Any suggestions?
>Thanks,
>Mark Watson

I use PVP 360 and it works OK

Regards.

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