Predicted to enable carboxylic ester hydrolase activity. Acts upstream of or within positive regulation of acrosome reaction. Predicted to be located in plasma membrane. Predicted to be integral component of membrane. Predicted to be active in brush border membrane. Is expressed in diencephalon lateral wall mantle layer; hypothalamus mantle layer; lung; midbrain mantle layer; and telencephalon mantle layer. Orthologous to human PLB1 (phospholipase B1). [provided by Alliance of Genome Resources, Apr 2022]