Albumin is the most abundant protein in the circulatory system. In mammals albumin is synthesized initially as preproalbumin by the liver. After removal of the signal peptide, the resultant proalbumin is further processed by removal of the six-residue propeptide from the new N-terminus. The albumin released into circulation possesses a half-life of 19 days. Immunogen: Purified BSA, whole molecule, emulsified in Freund’s adjuvant