however , free and polysomal messenger ribonucleoprotein ( mrnp ) particles and polysomes also isolated from chick embryonic muscle and analyzed by ouchterlony immunodiffusion and hemagglutination inhibition for the presence of the antigenic determinants showed reactivity to sm and rnp autoantibodies , but were not antigenic for the other four antibodies .
C0003316
antigenic determinants
C0003320
antigenic