The isolated polypeptides of the present invention are unique in the sense that they are not found in {HEAD ~ a pure or separated state} in {TAIL ~ nature} 
The isolated polypeptides of the present invention are unique in the sense that they are not found in { HEAD ~ a pure or separated state } in { TAIL ~ nature }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL