For purification of this Albumin an extensive heat-shock/diafiltration method is used, which has been shown to bring more highly purified products than the standard process acc. to Cohn. The process is taking place in a closed system. Molar extinction coefficient: 4,4x10 4 L x mol -1 x cm -1 (acc. to 0,667 L x mol -1 x cm -1 for a 0,1 % solution). Bovine Serum Albumin (BSA) Fraction V, NZ-Origin CELLPURE ® ≥98 %, fatty acid-free, IgG-free, very low endotoxin Highly pure albumin, prepared from blood of cattle certified for origin from Australia or New Zealand. Albumin, fatty acid-free, NZ-Origin, may well be used for blocking of all assays regarding membrane proteins, or other approaches aiming for fatty acid-associated proteins. It is also well suited for stabilisation of antibodies, enzymes or fatty acids. Albumin, fatty acid-free, NZ-Origin, shows exceedingly low content of endotoxins and IgGs, making it a useful reagent for cell biology also. Tested for the presence of fatty acids, IgGs, and endotoxins.