16. Receptor Regulation Principles of Pharmacology Study Guide Identification, characterization, and structure activity relationship of the ASIC3 selective peptide WRPRFa Communications Chemistry 16. Receptor Regulation Principles of Pharmacology Study Guide Effect of ascorbate on tachyphylaxis of 30 nM isoproterenol (IP) Download Scientific Diagram Not too big. Not too small. Because of their intermediate size, macrocyclic peptides combine the potency and precise targeting of an antibody or biologic therapy with the stability and ease of administration of a