The invention provides {HEAD ~ nucleic acid sequences} which regulate {TAIL ~ expression} of a nucleotide sequence of interest 
The invention provides { HEAD ~ nucleic acid sequences } which regulate { TAIL ~ expression } of a nucleotide sequence of interest
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH