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