{HEAD ~ The pipette} is cleaned thoroughly between dispenses and {TAIL ~ aspirations} by flushing with a PBS solution 
is cleaned thoroughly between
{ HEAD ~ The pipette } is cleaned thoroughly between dispenses and { TAIL ~ aspirations } by flushing with a PBS solution
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH