{HEAD ~ The presence} of {TAIL ~ the intermediate layer} allows the cutting tool to safely and completely cut a spot and remove the cut spot from the gel or membrane without scratching or otherwise damaging the surface, and with at most a temporary depression in the intermediate layer 
of
{ HEAD ~ The presence } of { TAIL ~ the intermediate layer } allows the cutting tool to safely and completely cut a spot and remove the cut spot from the gel or membrane without scratching or otherwise damaging the surface , and with at most a temporary depression in the intermediate layer
HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH