In the seventh aspect, the invention features a method for constructing a nematode having a genetic deletion in {HEAD ~ a region} of {TAIL ~ choice} 
of
In the seventh aspect , the invention features a method for constructing a nematode having a genetic deletion in { HEAD ~ a region } of { TAIL ~ choice }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL