Description: Peptide to 4A/4B, 5A/5B Peptide Form: Lyophilized powder Molecular Formula : C49H73N11O22S3Molecular Weight : 1264.38Purity : > 95%Chemical Structure : Ac-Asp-Glu-Met-Glu-Glu-Cys-Ser-Met-Ser-Tyr-NH2Storage/Stability : Shipped at 4°C. Store at -20°C for one year.