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