Kyowa Hakko Kirin Co., Limited

Inter-University Research Institute Corporation Research Organization of Information and Systems

Risa Ogawa

Masayoshi Tsukahara

Keina Yamaguchi

Koichi Kawakami

Megumi Kurokawa

Yoko Hayashi

This invention relates to a method for producing a protein of interest, comprising introducing a protein expression vector which comprises a gene fragment a gene fragment comprising a DNA encoding a protein of interest and a selectable marker gene and transposon sequences at both terminals of the gene fragment, into a suspension mammalian cell; integrating the gene fragment inserted between a pair of the transposon sequences, into a chromosome of the mammalian cell to obtain a mammalian cell capable of expressing the protein of interest; and suspension-culturing the mammalian cell; and a suspension mammalian cell capable of expressing the protein of interest.

Protein production method

The present invention relates to a method for integrating a gene fragment inserted between a pair of transposon sequences into a chromosome of a mammalian cell, comprising introducing at least one expression vector which comprises a gene fragment comprising a DNA encoding a protein of interest and also comprises a pair of transposon sequences at both terminals of the gene fragment, into a suspension mammalian cell; and a method for producing the protein of interest comprising suspension-culturing a suspension mammalian cell which produces the protein of interest; and an a suspension mammalian cell which expresses the protein of interest.

Process for production of protein

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Takasaki, Japan

Risa Ogawa