The oligonucleotides of the invention may consist of particular sequences or, in other aspects of the invention, there may be {HEAD ~ additional sequences} in {TAIL ~ the oligonucleotides} 
in
The oligonucleotides of the invention may consist of particular sequences or , in other aspects of the invention , there may be { HEAD ~ additional sequences } in { TAIL ~ the oligonucleotides }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL