a reagent layer containing {HEAD ~ an oxidase} applied to {TAIL ~ said support} such that one surface of said reagent layer is exposed to an air atmosphere; and 
applied to
a reagent layer containing { HEAD ~ an oxidase } applied to { TAIL ~ said support } such that one surface of said reagent layer is exposed to an air atmosphere ; and
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH