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