Hello Shane,
It's Mike here. Found your post on the Internet Immunology group. I think
the answer you are looking for is Hidde Ploegh's HC-10 MoAb. He is
usually very good about giving it out and there is a stock at the ICRF.
He also uses a rabbit polyclonal serum to do the same job. In the
original Stam paper they never actually say how the stuff was raised but
I suspect it has something to do with SDS extracts since you can
immunoprecipitate these with it.
If you need more help get in touch.
Mike Whelan
IAH