The presence, but not expression, of homologs of three structural genes and a regulatory gene necessary for aflatoxin biosynthesis in Aspergillus parasiticus and A. flavus was shown for A. oryzae and A. sojae. Homologs of the regulatory gene aflR were cloned and sequenced from A. oryzae and A. sojae.
Jeenes, D.J.; Fuller, L.J.; Watson, A.J.; Archer, D.B. Homologs of Aflatoxin Biosynthesis Genes and Sequence of aflR in Aspergillus oryzae and Aspergillus sojae. Applied and Environmental Microbiology (1999) 65 (1) 307-310.