through the combined use of an 131i-enzyme-antibody immune complex ( eic ) detection system and 125i-m315 , it was shown that the deviation from the linear binding of 125i-m315 observed during its indirect detection in the so-called linear region of the elisa titration curve was the result of changing ratios of bound eic : bound primary antibody , not altered enzymic activity .
C0003313
immune complex
C0003241
antibody