Cloning and functional comparison of kappa and delta opioid receptors from mouse brain.
Yasuda K, Raynor K, Kong H, Breder CD, Takeda J, Reisine T, Bell GI. Cloning and functional comparison of kappa and delta opioid receptors from mouse brain. Proc Natl Acad Sci U S A. 1993 Jul 15; 90(14):6736-40.