Nature Reviews Drug Discovery 5, 821–834 (2006); doi: 10.1038/nrd2132

In Table 3b (page 827), ACTH receptor agonists were wrongly included with nuclear receptors (steroid hormone receptors). They should have been included with G-protein-coupled receptors in Table 3a (page 826). In Table 3b, the entry in the 'Vitamin D receptor' row, in the column 'Drug examples', should be 'Vitamin D and analogues', not 'Retinoids', and reference 207 needs to be deleted accordingly. The authors thank a colleague for drawing their attention to this.