The inosine producing strain B3 was selected as the parent strain. Mutant B1916 with high D-ribose-producing ability was isolated by united mutagenic treatment of DES, uvradiation and protoplast treated by UV-way.

• 以肌苷产生菌B3为出发菌株 ,通过硫酸二乙酯、紫外线及原生质体紫外线等复合诱变处理 ,获得一株核糖高产积累突变株B1916。