An antibody targeted to {HEAD ~ an antigen} is brought into {TAIL ~ contact} with a body component in situ 
An antibody targeted to { HEAD ~ an antigen } is brought into { TAIL ~ contact } with a body component in situ
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH