Yields of virus like {TAIL ~ particles} derived from {HEAD ~ those optimized HPV L1 genes} are high 
Yields of virus like { TAIL ~ particles } derived from { HEAD ~ those optimized HPV L1 genes } are high
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH