Biotin is a growth factor that plays an important role in numerous reactions that are critical to microorganisms, plants, and animals. Biotin has a strong affinity for the protein avidin, a trait that has been utilized for many assay reporter applications. KAPA is a key intermediate in the biotin biosynthetic pathway.1
1
Izumi, Y., and Yamada, H. Microbial production of biotin. 231-256(1989).