Being production manner of the purine nucleoside which includes the process which recovers purine nucleoside from process, and the said nutrient medium which culture

摘要

Using a bacterium by belonging to one of the genus Bacillus or Escherichia, to enhance the activity of the protein encoded yeaS by (leuE) gene, purine nucleoside-producing ability is enhanced, the purine nucleoside guanosine such as inosine a method for producing 5'-guanylate, etc. 5'-purine nucleotides and a process for preparing or 5'-inosinic acid is provided.