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