The Agrobacterium binds to the plant cell walls and {HEAD ~ transfers} defined {TAIL ~ DNA regions} to the plant cell 
defined
The Agrobacterium binds to the plant cell walls and { HEAD ~ transfers } defined { TAIL ~ DNA regions } to the plant cell
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH