Thus, for example, most of the non protein constituents are removed by {HEAD ~ polyethyleneimine treatment} and the proteins including the polypeptides of the invention are precipitated, for example, by saturation of the solution with {TAIL ~ ammonium sulfate} or with other salts 
Thus , for example , most of the non protein constituents are removed by { HEAD ~ polyethyleneimine treatment } and the proteins including the polypeptides of the invention are precipitated , for example , by saturation of the solution with { TAIL ~ ammonium sulfate } or with other salts
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH