Darren Tyson wrote:
> (although I've never seen a protein migrate faster than expected
> on SDS-PAGE... how about anyone else?)
That can happen with very hydrophobic proteins (for example
transmembrane proteins), which bind more SDS than they should for their
size. A typical example would be the Na/K-ATPase alpha subunit, which
has a MW of 114 (from sequence), but runs at about 80 kDa.