title: Expression of dipeptidylaminopeptidase-IV in some human T and B cell lines.
abstract: The specificity of the expression of dipeptidylaminopeptidase-IV (DAP-IV) was examined in cells from leukemia patients and in 33 normal and leukemic human cell lines widely used in various studies. There was no correlation between DAP-IV activity and OKT4 positivity or maturation stage in T cells. In addition, DAP-IV was unexpectedly expressed by 4 B cell lines and 1 histiocytic lymphoma cell line, indicating either lack of specificity of DAP-IV or infidelity of gene expression under unnatural culture environment.
mesh_terms: D001402:B-Lymphocytes / Q000201:enzymology*; D002460:Cell Line; D018819:Dipeptidyl Peptidase 4; D004152:Dipeptidyl-Peptidases and Tripeptidyl-Peptidases / Q000032:analysis*; D006801:Humans; D007938:Leukemia / Q000145:classification / Q000201:enzymology*; D016403:Lymphoma, Large B-Cell, Diffuse / Q000201:enzymology; D009363:Neoplasm Proteins / Q000032:analysis*; D013601:T-Lymphocytes / Q000201:enzymology*
chemical_list: D009363:Neoplasm Proteins; D004152:Dipeptidyl-Peptidases and Tripeptidyl-Peptidases; D018819:Dipeptidyl Peptidase 4