{HEAD ~ Hydrophilic regions} of the envelope protein were identified by {TAIL ~ the technique} of Rose and Roy  
identified by
{ HEAD ~ Hydrophilic regions } of the envelope protein were identified by { TAIL ~ the technique } of Rose and Roy
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH