Of {HEAD ~ particular relevance} is the marked increase in the expression of genes associated with the production of {TAIL ~ gamma interferon}, a potent antiviral agent and regulator of the immune response 
Of { HEAD ~ particular relevance } is the marked increase in the expression of genes associated with the production of { TAIL ~ gamma interferon } , a potent antiviral agent and regulator of the immune response
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH