Section IV describes in vivo and in vitro tests of synthetic amplifiers whose molecular structure is based on that of {HEAD ~ the endogenous amplifier materials} described in {TAIL ~ the preceding sections} 
described in
Section IV describes in vivo and in vitro tests of synthetic amplifiers whose molecular structure is based on that of { HEAD ~ the endogenous amplifier materials } described in { TAIL ~ the preceding sections }
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 HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL