The excision of sample spots from a gel or membrane by pressing {TAIL ~ a cutting tool} terminating in {HEAD ~ a hollow cylinder} against the gel or membrane supported on a rigid surface is made more reliable by interposing a relatively pliable, intermediate layer on the side of the surface facing the gel or membrane 
The excision of sample spots from a gel or membrane by pressing { TAIL ~ a cutting tool } terminating in { HEAD ~ a hollow cylinder } against the gel or membrane supported on a rigid surface is made more reliable by interposing a relatively pliable , intermediate layer on the side of the surface facing the gel or membrane
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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