PE-22-28 is a synthetic peptide derived from Spadin, studied in neuropharmacology and potassium-channel research. It is supplied as a high-purity white lyophilized powder at >=99% HPLC purity in sealed vials. PE-22-28 is investigated in research on TREK-1 channel modulation and related neuronal signaling, and is commonly applied in cell-based and preclinical studies. The stable freeze-dried presentation supports convenient reconstitution and reproducible dosing.. We maintain strict quality control across batches and provide COA for specific batches on request. The unopened product should be stored sealed at 2-8 degree C, protected from light and moisture; for long-term storage keep at -20 degree C and avoid repeated thawing. Small and large orders are accepted, and OEM, private-label and discreet neutral-packaging services are available with worldwide delivery. Laboratory research use only, not for human or veterinary purposes.