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