Non limiting examples for P include the OCT 4 promoter, and {HEAD ~ the promoter} of {TAIL ~ telomerase reverse transcriptase}  
Non limiting examples for P include the OCT 4 promoter , and { HEAD ~ the promoter } of { TAIL ~ telomerase reverse transcriptase }
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 OTH