In another embodiment, the invention features a purified or recombinant polypeptide comprising an amino acid sequence represented by the formula A B, wherein A represents all or the portion of the amino acid sequence designated by {HEAD ~ residues} 24 193 of {TAIL ~ SEQ ID} 
of
In another embodiment , the invention features a purified or recombinant polypeptide comprising an amino acid sequence represented by the formula A B , wherein A represents all or the portion of the amino acid sequence designated by { HEAD ~ residues } 24 193 of { TAIL ~ SEQ ID }
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL