Antigen antibody complex is formed by the antigen antibody reaction between the antigen in the sample and the antibody fixed on {HEAD ~ the outer surfaces} of {TAIL ~ the cell membranes} of the cells 
Antigen antibody complex is formed by the antigen antibody reaction between the antigen in the sample and the antibody fixed on { HEAD ~ the outer surfaces } of { TAIL ~ the cell membranes } of the cells
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH