two or more reagent storage reservoirs, a first one for storing a lysing reagent and {TAIL ~ a second one} for storing {HEAD ~ a sphering reagent} 
two or more reagent storage reservoirs , a first one for storing a lysing reagent and { TAIL ~ a second one } for storing { HEAD ~ a sphering reagent }
OTH OTH OTH OTH 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