EC 2.1.1.109     
Accepted name: demethylsterigmatocystin 6-O-methyltransferase
Reaction: S-adenosyl-L-methionine + 6-demethylsterigmatocystin = S-adenosyl-L-homocysteine + sterigmatocystin
Other name(s): demethylsterigmatocystin methyltransferase; O-methyltransferase I
Systematic name: S-adenosyl-L-methionine:6-demethylsterigmatocystin 6-O-methyltransferase
Comments: Dihydrodemethylsterigmatocystin can also act as acceptor. Involved in the biosynthesis of aflatoxins in fungi.
References:
1.  Yabe, K., Ando, Y., Hashimoto, J. and Hamasaki, T. 2 distinct O-methyltransferases in aflatoxin biosynthesis. Appl. Environ. Microbiol. 55 (1989) 2172–2177. [PMID: 2802602]
[EC 2.1.1.109 created 1992]