Patent ID: 6844177

Claim:
An isolated, enriched, or purified PTP04 polypeptide, wherein said polypeptide comprises: (a) an amino acid sequence comprising at least 90% identity to the full length amino acid sequence set forth in SEQ ID NO: 2; (b) an amino acid sequence comprising a sequence having at least 90% identity over the length of amino acid residues 49-294 of SEQ ID NO: 2, and lacking amino acid residues 1-48 of SEQ ID NO: 2; (c) an amino acid sequence comprising a sequence having at least 90% identity over the length of amino acid residues 49-294 of SEQ ID NO:2; or (d) an amino acid sequence comprising a sequence having at least 90% identity over the length of amino acid residues 49-294 of SEQ ID NO:2 and lacking amino acid residues 1-48 or amino acid residues 295-807, wherein said polypeptide possesses an enzymatic activity of a tyrosine phosophatase.