{TAIL ~ The one or more purified polypeptides} can be {HEAD ~ about 15 to about 75 amino acids} in length 
{ TAIL ~ The one or more purified polypeptides } can be { HEAD ~ about 15 to about 75 amino acids } in length
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH