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  • Title: Characterization of a cDNA clone encoding a new species of the nonspecific cross-reacting antigen (NCA), a member of the CEA gene family.
    Author: Arakawa F, Kuroki M, Misumi Y, Oikawa S, Nakazato H, Matsuoka Y.
    Journal: Biochem Biophys Res Commun; 1990 Feb 14; 166(3):1063-71. PubMed ID: 2306228.
    Abstract:
    To clarify the molecular structures of the nonspecific cross-reacting antigens (NCAs) produced by human granulocytes, we cloned cDNAs from libraries of normal white blood cells. A clone, NCA-W272, was found to code a protein similar to NCA of tumor cells. The protein consisted of a signal peptide (34 aa), domain-N (108 aa), -A1 (92 aa), -B1 (86 aa) and -M (29 aa). Similarity of the amino acid sequence of each domain to that of the tumor NCA was 72, 92, 76 and 79%, respectively. COS-1 cells transfected with an expression vector carrying the cDNA synthesized a 70 kDa glycoprotein, which was reactive with anti-NCA antibody and released from cell surface by phosphatidylinositol-specific phospholipase C. Thus the clone NCA-W272 was indicated to encode a new species of NCA distinct from the tumor NCA.
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