{HEAD ~ The resulting precipitation} is separated by {TAIL ~ centrifugation} and the supernatant liquid is in principle further treated according to Cohn for precipitation of fraction II+III 
is separated by
{ HEAD ~ The resulting precipitation } is separated by { TAIL ~ centrifugation } and the supernatant liquid is in principle further treated according to Cohn for precipitation of fraction II+III
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH