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