APF/CBP, the small, amphipathic, anionic protein(s) in bile and gallstones, consists of lipid‐binding and calcium‐binding forms
H Lafont, N Domingo, A Groen, E W Kaler, S P Lee, R Koehler, J D Ostrow, A Veis – 30 December 2003 – Two very similar small anionic, amphipathic proteins, a phospholipid‐binding apoprotein (anionic polypeptide fraction [APF]) and a calcium‐binding polypeptide (CBP), are found abundantly in bile and all types of gallstones. The often disparate properties among various preparations of APF/CBP could reflect different sources and separation procedures, leading to partly degraded and/or denatured protein and varied association of bile salts, lipids, bile pigments, and detergents.