B7-33 is a synthetic single-chain relaxin mimetic derived from the B-chain of relaxin, designed to selectively activate the RXFP1 receptor while reducing affinity for other relaxin receptors. It is supplied as a high-purity white lyophilized powder at >=99% HPLC purity in sealed vials. B7-33 is investigated in research on fibrosis, tissue remodeling and relaxin-receptor signaling, and is commonly applied in cell-culture and preclinical studies. The stable freeze-dried format supports easy reconstitution and reproducible dosing.. All lots pass strict quality verification and lot-specific certificates can be provided on request. Keep unopened material sealed at 2-8 degree C away from light and moisture; store at -20 degree C for longer periods and avoid repeated freezing. We accept small trial and large bulk orders and provide OEM, private-label and neutral discreet-packaging services with global delivery. Laboratory research use only.