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.
Example of the effects of an injection of the highest dose of fentanyl (60 mg/kg ip) on instantaneous respiratory flow (V̇) in a β-arr2-deficient mouse. This mouse presented a terminal apnea within 5 min. This type of response was observed in 1 out of 20 control mice and 8 out of 20 β-arr2-deficient animals. β-arr2, β arrestin 2.
