While Exodus has many of the conserved amino acid features of the other human C C chemokines, there are {HEAD ~ several unusual characteristics} of {TAIL ~ Exodus} that are worth noting 
While Exodus has many of the conserved amino acid features of the other human C C chemokines , there are { HEAD ~ several unusual characteristics } of { TAIL ~ Exodus } that are worth noting
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 HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH