Vol. 189 No. 7, June 28, 2010. Pages 1107–1115.

The authors regret an error in the Materials and methods section of this paper pertaining to the use of a certain antibody. The correct sentence appears below:

Alternatively, beads were labeled with monoclonal anti–E-cadherin antibodies (also used as a blocking antibody in these experiments; DECMA-1; Sigma-Aldrich) using an identical protocol.