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