1
T treatment with only the cognate ligand human relaxin-3 causes RXFP3 to undergo classic b-arrestin ependent internalization. The detailed mechanisms involved in RXFP3 internalization, phosphorylation, and recycling/ degradation all remain to be determined. D. Relaxin Family Peptide Receptor 4 1. G Proteins That Couple to Relaxin Family Peptide Receptor 4. There is currently a paucity of informati