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