Correction for Javadi and Main, Exploring the folding energy landscape of a series of designed consensus tetratricopeptide repeat proteins

Correction for ‘‘The role of fluctuations and stress on the effective viscosity of cell aggregates,’’ by Philippe Marmottant, Abbas Mgharbel, Jos Käfer, Benjamin Audren, Jean-Paul Rieu, Jean-Claude Vial, Boudewijn van der Sanden, Athanasius F. M. Marée, François Graner, and Hélène Delanoë-Ayari, which appeared in issue 41, October 13, 2009, of Proc Natl Acad Sci USA (106:17271–17275; first published September 25, 2009; 10.1073/pnas.0902085106). The authors note that, due to a printer’s error, the affiliation for Abbas Mgharbel, Benjamin Audren, Jean-Paul Rieu, and Hélène Delanoë-Ayari at Université de Lyon appeared incorrectly in part. The name of the authors’ laboratory, Laboratoire Matériaux et Phénomènes Quantiques, should instead have appeared as Laboratoire de Physique de la Matière Condensée et Nanostructures. The corrected affiliation line appears below.