Inhibits the enzymatic activity of the basic phospholipase A2 (PLA2). Homotrimer. Secreted in plasma. Concentration of this protein in the serum is 8-fold lower than in the E.quadrivirgata (another non-venomous snake) serum. This difference may reflect the difference in the food habits of these snakes. E.quadrivirgata preys upon snakes including the venomous snakes, whereas E.climacophora only preys upon small mammals and birds. Belongs to the beta-type phospholipase A2 inhibitor family.