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(Biophysical Journal 103, August 2012; 541–549)
The authors identified an omission in this article. The figure legend for Figure S2 should include the following: “The model displayed here includes full-length calcium-bound CaM and the matrix protein sequence spanning amino acids 1–113; i.e., it does not include the flexible C-terminal tail (amino acids 114–133).” None of the article’s conclusions are affected by this omission. In addition, after publication of the article, the SAXS and SANS data and modeling for this article were deposited in the Small Angle Scattering Biological Data Bank (SASBDB; https://www.sasbdb.org/) under accession code SASDKR3. Finally, the first author’s name should appear as “James E. N. Taylor” rather than “James E. Taylor.”