Help! Immunoprecipitation beads that mouse IgM can bind

[Keld Sorensen]

A protein such as mannose binding protein from rabbit serum
will bind IgM - it is available in an immobilized for (bound
to crosslinked agarose, i.e. a Sepharose-type support) 
intended for purification of IgM (column) - I don't have info
on its use in IP, but theoretically it should work. The 
capacity is around 1 mg/ml of support.

Keld.