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We describe the chromosomal assignment and biochemical characterization of the genetic locus controlled by a human cell surface antigen which is defined by the monoclonal antibody (MAb) AUAI. This gene product is only expressed on epithelial cells. Therefore, human-mouse somatic cell hybrids of epithelial origin were used to assign this gene to chromosome 2. Cell surface iodination of the hybrids and parental cells followed by immunoprecipitation and polyacrylamide gel electrophoresis showed that AUAI detected a single 35-kDa protein. The MAb AUAI reacted on tissue sections with a subset of normal epithelial cells, but in tumours it showed a much wider distribution, though still only on epithelium-derived tumours.

Type

Journal article

Journal

Int J Cancer

Publication Date

15/11/1986

Volume

38

Pages

631 - 636

Keywords

Antibodies, Monoclonal, Antigens, Surface, Chromosome Mapping, Colon, Colonic Neoplasms, Enzyme-Linked Immunosorbent Assay, Flow Cytometry, Humans, Molecular Weight, Tissue Distribution