The amount of a 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase delta-3 when measured in blood serum. The trait is level of 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase delta-3 in blood serum (OBA_2042920). Also known as: blood serum 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase delta-3 amount.