Process for producing substance

摘要

The present invention relates to a process for producing a substance, which comprises culturing an animal cell having an ability to produce the substance in a medium containing a ubiquinone such as Q10 until the substance is produced and accumulated in the culture, and recovering the substance therefrom, and a method of improving the productivity of a substance, which comprises culturing an animal cell having an ability to produce the substance in a medium containing a ubiquinone.