“Abstract: In synaptosomal brain … acid (cis), elaidic acid (trans), and … of vaccenic acid , at a concentration of 0.87 μmol of lipid/mg of protein, strongly reduced the Bmax and, to … binding affinity of the μ‐selective opioid [3H]Tyr‐D‐Ala‐Gly‐(Me)Phe‐Gly‐ol ([3H]DAMGO).”