Yet more particularly, {HEAD ~ the exemplary age regulatory element} 5′ has been discovered to regulate {TAIL ~ stable gene expression} over time in vivo, while the exemplary age regulatory element 3′ has been discovered to regulate increased gene expression over time in vivo 
discovered to regulate
Yet more particularly , { HEAD ~ the exemplary age regulatory element } 5′ has been discovered to regulate { TAIL ~ stable gene expression } over time in vivo , while the exemplary age regulatory element 3′ has been discovered to regulate increased gene expression over time in vivo
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH