In the above article [Koole C, Wootten D, Simms J, Valant C, Miller LJ, Christopoulos A, and Sexton PM (2011) Mol Pharmacol 80:486–497], acknowledgment of funding from the National Institutes of Health National Institute of Diabetes and Digestive and Kidney Diseases [Grant DK46577] was omitted.
The authors regret this error and apologize for any confusion and inconvenience it may have caused.