A hydrophobic, porous, oxygen permeable layer is positioned between the reagent layer and the support, such that oxygen can permeate to {TAIL ~ the layer} containing {HEAD ~ oxidase} 
A hydrophobic , porous , oxygen permeable layer is positioned between the reagent layer and the support , such that oxygen can permeate to { TAIL ~ the layer } containing { HEAD ~ oxidase }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD