BIOPHYSICS AND COMPUTATIONAL BIOLOGY Correction for “In vivo optical trapping indicates kinesin’s stall force is reduced by dynein during intracellular transport,” by Benjamin H. Blehm, Trina A. Schroer, Kathleen M. Trybus, Yann R. Chemla, and Paul R. Selvin, which appeared in issue 9, February 26, 2013, of Proc Natl Acad Sci USA (110:3381–3386; first published February 12, 2013; 10.1073/pnas.1219961110).
The authors note that the Acknowledgments section should instead appear as: “This work was supported by Grants NSF 0822613 (to P.R.S. and Y.R.C.), NIH AR044420 and GM068625 (to P.R.S.); NSF 09-52442 and Burroughs-Wellcome Fund CASI (to Y.R.C.); NIH GM078097 (to K.M.T.); NIH GM044589 (to T.A.S.).”