... 5 (TF5), is an acidic peptide comprised of 28 amino acid residues. It has biological regulatory functions that include: (1) recover ... .0%7,Total impurity (by two HPLC methods): ≤2%8,Peptide content (Kjeldahl method): ≥85%9,Assay (anhydrous, without acetate): ... 95%-105%10,Bacterial endotoxins: ≤5EU/mgPackage: plastic bottle (peptide special) or glass vialShort-term storage: avoid from moisture and ...