The tool is thus lowered against the gel or membrane and pressed with sufficient force to penetrate the gel or membrane without penetrating the intermediate layer, thereby fully excising the spot in the form of {HEAD ~ a disk} from the gel or {TAIL ~ membrane} without also excising any of the intermediate layer 
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The tool is thus lowered against the gel or membrane and pressed with sufficient force to penetrate the gel or membrane without penetrating the intermediate layer , thereby fully excising the spot in the form of { HEAD ~ a disk } from the gel or { TAIL ~ membrane } without also excising any of the intermediate layer
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 HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH