or rather 3-12 %. I have good experiences with Novex gels, which I used for IgMs. Pentameric and hexameric bands which are around 1000 kDa and 1200 kDa respectively are then quite high on a gel, therefore I am not sure, if 4-8% gradient would be sufficient.

u can try 4-8 % PAGE gels

or rather 3-12 %. I have good experiences with Novex gels, which I used for IgMs. Pentameric and hexameric bands which are around 1000 kDa and 1200 kDa respectively are then quite high on a gel, therefore I am not sure, if 4-8% gradient would be sufficient.

The Bis-tris gels described here:

http://openwetware.org/wiki/Sauer:bis-Tris_SDS-PAGE%2C_the_very_best

are the basis of the Novex commercial gels apparently. There are two choices of running buffer giving separation of either very large or small proteins. The MOPS option combined with a low % gel should allow you to resolve those sizes.

You may find Infos

http://bio.lonza.com/uploads/tx_mwaxmarketingmaterial/Lonza_BenchGuides_SourceBook_Section_XIII_-_Protein_Separation_in_Agarose_Gels.pdf

Maria, are you performing wesern blotting with these agarose gels..?

Pulsed field gel electrophoresis has also been used for the separation of high molecular weight proteins. It provides better resolution of high molecular weight proteins from each other.

http://www.ncbi.nlm.nih.gov/pubmed/7813396