Methods are disclosed for screening for the occurrence of {HEAD ~ gene} silencing in {TAIL ~ an organism} 
silencing in
Methods are disclosed for screening for the occurrence of { HEAD ~ gene } silencing in { TAIL ~ an organism }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL