Supplementary information

From the following article

Indirubin, the active constituent of a Chinese antileukaemia medicine, inhibits cyclin-dependent kinases

Ralph Hoessel, Sophie Leclerc, Jane A. Endicott, Martin E. M. Nobel, Alison Lawrie, Paul Tunnah, Maryse Leost, Eve Damiens, Dominique Marie, Doris Marko, Ellen Niederberger, Weici Tang, Gerhard Eisenbrand & Laurent Meijer

Nature Cell Biology 1, 60 - 67 (1999)

doi:10.1038/9035