{HEAD ~ The vector} is preferably {TAIL ~ non tumor} inducing bacteria, more preferably Agrobacterium 
is preferably
{ HEAD ~ The vector } is preferably { TAIL ~ non tumor } inducing bacteria , more preferably Agrobacterium
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH