Volume 453 (2013), pp. 179–186

The incorrect PDB code was associated with the pentameric α-7 nicotinic receptor in the section ‘The Ca2+-binding sites of ACCBP are arranged with a 5-fold symmetry, which is essential for ACC formation’ (page 184). The correct PDB code is 3SQ6. This error occurs in the print journal; the online version is not affected.