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