on immunizing rabbits by repeated injections of paranuclein or of casein , and subsequently testing their sera for precipitins and fixation antibodies , it was found that casein apparently produces them much more readily , giving an antiserum that reacted ( fixation ) in very high dilution with casein ( 0.000,000,1 of a 1 per cent . solution ) , but much less strongly with paranuclein .
C0003241
antibodies
C0020960
antiserum