Abstract:
An expression vector for animal cell is provided to increase expression efficiency of a foreign gene in an animal cell by introducing at least one copy of MAR(matrix attachment region) DNA sequences to the 3' terminal of a gene transcription termination region. An expression vector for animal cell comprises a operatively linked promoter, a polynucleotide encoding a cloning site or a foreign product, and a transcription termination region of which 3' terminal comprises at least two copy of human beta-globin gene MAR DNA sequences in which the MAR sequences are adjacent together or separated by a coding or non-coding sequence. The polynucleotide is LacZ(beta-galactosidase polypeptide), immunoglobulin, GCSF(granulocyte colony stimulating factor) or EPO(erythropoietin) and the animal cell is CHO(Chinese hamster ovary), BHK(baby hamster kidney), NSO(non-secreting mouse myeloma) or human cell.