Cross-Linked Molecular Weight Markers

[Frank O. Fackelmayer]

Hi Marc,
We have often used the phosphorylase b marker from Sigma, and found it works
very well when used in non-Laemmli-type SDS gels (1 to 6mers are no problem to
see). They do NOT work for the usual Laemmli-type gels; that´s what Sigma says
in the data sheet (and it´s true).
There are several other gel systems for resolving HMW proteins, and you´ll
probably have to try some of them to get good resolution of your favorite protein.

Hope this helps,
Frank


Marc Domanus wrote:
> 
> Does anyone know of a high molecular weight protein marker for use with
> SDS-PAGE that has a range between 100,000-500,000 Da?
> 
>      I have tried Sigma’s phosphorylase b cross-linked rabbit marker
> (P8906) and am only able to see the 97,400 monomer.  The dimer which
> should contain 28% overall intensity is not visible.  Any suggestions?
> 
> Thank you,
> 
> Marc Domanus
> mhdoman at rs6000.cmp.ilstu.edu