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