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