{HEAD ~ Method} 1, wherein the polyethylene glycol used as precipitating agent has {TAIL ~ a molecular weight} of from 3000 to 6000 
{ HEAD ~ Method } 1 , wherein the polyethylene glycol used as precipitating agent has { TAIL ~ a molecular weight } of from 3000 to 6000
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH