Retraction Notice to: A Self-Produced Trigger for Biofilm Disassembly that Targets Exopolysaccharide
Ilana Kolodkin-Gal, Shugeng Cao, Liraz Chai, Thomas Böttcher, Roberto Kolter, Jon Clardy,* and Richard Losick*
*Correspondence: jon_clardy@hms.harvard.edu (J.C.), losick@mcb.harvard.edu (R.L.) http://dx.doi.org/10.1016/j.cell.2015.04.039
In this article, we reported that norspermidine is produced in aged biofilm cultures of Bacillus subtilis and that norspermidine could disassemble and inhibit B. subtilis biofilms. Both claims have been challenged by Hobley et al. (2014, Cell 156, 844–854). We have subsequently repeated the experiments and have found that the new results can no longer support our original conclusions. Therefore, the most appropriate course of action is to retract the article. We offer our apologies for these errors and for any inconvenience that they may have caused.