The trithorax-group protein Lid is a histone H3 trimethyl-Lys4 demethylase

Lee, N., Zhang, J., Klose, R. J., Erdjument-Bromage, H., Tempst, P., Jones, R. S. and Zhang, Y. (2007) The trithorax-group protein Lid is a histone H3 trimethyl-Lys4 demethylase. Nat Struct Mol Biol. 14, 341-343

http://www.nature.com/nsmb/journal/v14/n4/full/nsmb1216.html