The blood is centrifuged and {HEAD ~ the resulting plasma} is treated according to Cohn for {TAIL ~ precipitation} of fraction I, i.e. is cooled and an ethanol buffer mixture is added, pH being maintained at 7.0 7.4, preferably about 7.2 
The blood is centrifuged and { HEAD ~ the resulting plasma } is treated according to Cohn for { TAIL ~ precipitation } of fraction I , i.e. is cooled and an ethanol buffer mixture is added , pH being maintained at 7.0 7.4 , preferably about 7.2
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH