Patent ID: 7728108

Claim:
An isolated polypeptide comprising an amino acid sequence having at least 95% amino acid sequence identity to (a) the amino acid sequence of the polypeptide shown in FIG. 2 (SEQ ID NO:2), b) the amino acid sequence of the polypeptide shown in FIG. 2 (SEQ ID NO:2), lacking its associated signal peptide, (c) the amino acid sequence of the full-length polypeptide encoded by the cDNA deposited under ATCC Accession No. 203323, or (d) the amino acid sequence of the full-length polypeptide encoded by the cDNA deposited under ATCC Accession No. 203323, lacking its associated signal peptide; wherein said isolated polypeptide can be used to generate an antibody which can be used to specifically detect the polypeptide of SEQ ID NO: 2 in esophageal, stomach, lung, or rectal tissue samples.