Is it possible to perform immunoprecipitation (IP) directly on protein fractions from the Qproteome Cell Compartment Kit?
FAQ ID -855

We have not tested immunoprecipitation on protein fractions from the Qproteome Cell Compartment Kit. However, since Buffers CE1, CE2 and CE3 are native buffers, we would expect that they would work for this application. It might be a good idea to dilute the fractions 1:1 with a buffer already tested for immunoprecipitation to adjust to IP conditions. Buffer CE4 is strongly denaturing, so the final protein fraction 4 may not be used for immunoprecipitation.