16. Receptor Regulation Principles of Pharmacology Study Guide Identification, characterization, and structure activity relationship of the ASIC3 selective peptide WRPRFa Communications Chemistry Glycyl L histidyl L lysine Cu2+ (GHK Cu) Attenuates CuSO4 or LPS induced inflammation in Zebrafish larvae model ScienceDirect 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