PURPOSE: A composition and a kit for diagnosing and/or treating cancer are provided to reduce telomerase activity which is enhanced by HCCR-1 in RKO cells. CONSTITUTION: A composition for treating colon cancer contains an amino acid sequence of sequence number 3 as an active ingredient. A composition for diagnosing cancer contains a protein containing an amino acid of sequence number 1 or 2 as a marker for diagnosing cancer. The composition contains a monoclonal antibody which binds to an amino acid residue of sequence number 1 or 2. A kit for diagnosing cancer contains the protein. A kit for diagnosing cancer contains the monoclonal antibody.본 발명은 암 진단 및/또는 치료용 조성물 및 키트에 관한 것이다.
