Studies  have shown that lactase is produced by A. oryzae when grown on wheat bran and spent beer grains.
- Why would A. oryzae produce lactase when these substrates have no lactose?
- In , it's shown that A. oryzae produces more lactase when grown on wheat bran vs when grown on whey, which has lactose in it - what might explain that?
- Since lactose is found in mammals and is not common elsewhere, how/why could A. oryzae have evolved the ability to produce lactase in the first place?
 Bailey, M. J., & Linko, M. (1990). Production of β-galactosidase by Aspergillus oryzae in submerged bioreactor cultivation. Journal of Biotechnology, 16(1-2), 57–66. doi:10.1016/0168-1656(90)90065-j