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Platelet Factor 4 PRODUCT INQUIRYDomain Structure of Platelet Factor 4 The domain structure of the platelet factor-4 monomer is represented. The platelet factor-4 monomer is a 7,800 molecular weight peptide. The heparin-binding domain is presumably localized within a COOH-terminal region of the molecule where several lysine residues are clustered. In its native state, platelet factor-4 is a homotetramer which exists in complex with a high molecular weight proteoglycan carrier protein. HPF4-0180 Human Platelet Factor 4 Pricing: Please Inquire SAMPLE DATA SHEET | SAFETY DATA SHEET Size 100 µg Formulation 25 mM Hepes, 2 M NaCl, pH 7.4 Storage -80°C Purity >95% by SDS-PAGE Activity Determination Heparin neutralization Shelf Life (properly stored) 12 months