B7-33

B7-33 is a research peptide made from part of human relaxin-2. It was designed as a simpler, single-chain way to study some of the same signals linked to the relaxin system. A major target in this research is the RXFP1 receptor. Researchers study B7-33 for tissue remodeling and fibrosis, which is the buildup of thick, scar-like tissue. Studies have looked at heart, kidney, lung, and other tissue models. The main interest is how RXFP1 signals may affect the material around cells and the way tissue repairs or remodels itself. That focused pathway is what makes B7-33 stand out in fibrosis research.