Naloxone is specific and competitive opiate antagonist at mu, kappa, delta and sigma receptors; it blocks the action of sigma-agonists at opioid sites. It displaces morphine and other opiate agonists from the opiate receptor. It is more potent than Nalorphine and is also an effective antagonist for…

N-t-Boc-Phe-Leu-Phe-Leu-Phe is a chemotactic peptide antagonist. A competetive antagonist of the binding of N-formly-Met-Leu-Phe to neutrophils. N-Boc-Phe-Leu-Phe-Leu-Phe(Boc-PLPLP) is used extensively in Formyl Peptide Receptor(FPR) research. In regard to neutrophils, it was found that…