{HEAD ~ A chemically modified microporous membrane} is positioned between {TAIL ~ the two templates} so that the holes in a first template are aligned with the holes in the second template, and the exposed portion of the membrane between a set of mating holes is sealed from other sets of mating holes 
{ HEAD ~ A chemically modified microporous membrane } is positioned between { TAIL ~ the two templates } so that the holes in a first template are aligned with the holes in the second template , and the exposed portion of the membrane between a set of mating holes is sealed from other sets of mating holes
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH