{TAIL ~ Antibody/antigen complex} may then be amplified to an appropriate level, and a second step antibody is brought into contact with the antibody/antigen complex to render {HEAD ~ the complex} macroscopically detectable 
{ TAIL ~ Antibody / antigen complex } may then be amplified to an appropriate level , and a second step antibody is brought into contact with the antibody / antigen complex to render { HEAD ~ the complex } macroscopically detectable
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH 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 OTH OTH