This phospholipase A2 inhibitor neutralizes the activity of basic PLA2 myotoxins of its own and related venoms. The inhibitory profile shows specificity towards group II PLA2, either belonging to the catalytically-active (D49) or -inactive (K49) subtypes. Homotrimer; non-covalently linked. Secreted in plasma. Expressed by the liver. N-glycosylated. Belongs to the alpha-type phospholipase A2 inhibitor family.