Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Adenylyl cyclase activity in membranes from CHO cells expressing wild-type (WT) or L339,340A mutant β2-adrenergic receptors. The activity was determined in the presence of increasing concentrations of (−)-isoprenaline. The data represent the mean ± SEM of 10 (wild type) or 6 (mutant) experiments. The signaling efficiencies of the wild-type and mutant receptors were quantified by calculating their transducer ratios τ.
