Fermentation of the engineered strain B.subtilis 25 shows that the riboflavin production is nearly 50% lower than that of the original riboflavin-produce strain, but no FMN was detected.

• 通过培养和发酵观察发现,枯草芽孢杆菌25菌落和液体培养物颜色明显低于24A1,核黄素发酵能力下降了50%25左右,结果说明实现了ribR基因在24A1中的表达。