Main Reaction: 3-hydroxyindole + 2-hydroxyindole >> Indirubin

Reference: PubMed ID: 22954889
Authors: Han GH, Gim GH, Kim W, Seo SI, Kim SW
Title: Enhanced indirubin production in recombinant Escherichia coli harboring a flavin-containing monooxygenase gene by cysteine supplementation.
Published: 2012 Dec 15

3-hydroxyindole + 2-hydroxyindole --> Indirubin