The antigen or {HEAD ~ antibody} is mixed with a molten thermoplastic and formed into {TAIL ~ the solid phase substrate}  
formed into
The antigen or { HEAD ~ antibody } is mixed with a molten thermoplastic and formed into { TAIL ~ the solid phase substrate }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH