Preferably the foreign nucleic acid is {TAIL ~ one or more genes} which is preferably contained in {HEAD ~ a plasmid} 
Preferably the foreign nucleic acid is { TAIL ~ one or more genes } which is preferably contained in { HEAD ~ a plasmid }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD