{HEAD ~ The nucleic acid ligands} of the present invention consist of {TAIL ~ at least one nucleic acid region} and not necessarily, but preferably at least one functional unit 
{ HEAD ~ The nucleic acid ligands } of the present invention consist of { TAIL ~ at least one nucleic acid region } and not necessarily , but preferably at least one functional unit
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH