FPB White to off-white solid. Released from fibrinogen by thrombin action. Release of fibrinopeptide B from fibrinogen appears to be necessary for Ca2+ uptake and subsequent binding to fibrin. Purity: ≥95% by HPLC. Sold on the basis of peptide content. Prepared from tissue of individuals that has been shown by certified tests to be negative for HBsAg and for antibodies to HIV and HCV. CAS 36204-23-6. Pyr-Gly-Val-Asn-Asp-Asn-Glu-Glu-Gly-Phe-Phe-Ser-Ala-Arg-OH (Pyr = L-pyroglutamyl) Ref.: Mihalyi, E. 1988. Biochemistry 27, 976. Blomback, B., et al. 1966. Biochim. Biophys. Acta 115, 371. | 
