In some embodiments, the present invention provides a computer readable medium encoding {HEAD ~ a representation} of {TAIL ~ the nucleic acid sequence} 
of
In some embodiments , the present invention provides a computer readable medium encoding { HEAD ~ a representation } of { TAIL ~ the nucleic acid sequence }
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 TAIL TAIL