Using the methods published in Reese and Haimo (2000), the author's laboratory has been unable to reproduce the data in Figs. 2–6 of this article that demonstrate microtubule motor and dynactin regulation as a function of the direction of organelle transport in melanophores. The authors wish to correct the scientific record and retract the findings of this paper until such time as they are able to resolve the discrepancy.
A statement from each of the authors agreeing to the retraction of this article is on file at the Rockefeller University Press.