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