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