In the article by Wang et al. [Wang J, Wang L, Zheng J, Anderson JL and Toews ML (2000) Identification of distinct carboxyl-terminal domains mediating internalization and down-regulation of the hamster _1B-adrenergic receptor. Mol Pharmacol 57:687-694] a correction in the text, which is of potential scientific importance, was not made before printing.

Under Results in the Initial Truncation Mutations section on p. 690, text that read "The Tr366 receptor, truncated after Gln366, was expressed at levels similar to the wild-type receptor and exhibited binding and functional properties similar to the wild-type receptor (Table 1) but was completely defective... ", should read "The Tr366 receptor, truncated after Gln366, was expressed at lower levels than the wild-type receptor but exhibited binding and functional properties similar to the wild-type receptor (Table 1); however, it was completely defective... . ". We regret any inconvenience caused by this error.