{HEAD ~ Amplifier molecules} can include {TAIL ~ a targeting group} permitting the molecules to preferentially attach to a particular anatomical or physiological situs 
include
{ HEAD ~ Amplifier molecules } can include { TAIL ~ a targeting group } permitting the molecules to preferentially attach to a particular anatomical or physiological situs
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH