By “isolated” in reference to a polypeptide is meant a polymer of 6, 12, 18 or more amino acids conjugated to each other, including {HEAD ~ polypeptides} that are isolated from {TAIL ~ a natural source} or that are synthesized 
are isolated from
By “ isolated ” in reference to a polypeptide is meant a polymer of 6 , 12 , 18 or more amino acids conjugated to each other , including { HEAD ~ polypeptides } that are isolated from { TAIL ~ a natural source } or that are synthesized
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH