a synthetic opioid that is up to three times more potent than fentanyl. "We will not allow drug dealers to hide behind novel ...

Now two independent research teams have produced high-resolution atomic structures of the mu-opioid receptor (µ-OR), which recognizes morphine and codeine, and the kappa-opioid receptor (?-OR), the ...

It's like a molecular lock waiting for the right ... Scott et al, Impact of Intracellular Proteins on μ-Opioid Receptor ...