Responsible for guiding the germ cells early in the process of migration from the lumen of the developing gut towards the overlying mesoderm, where the germ cells enter the gonads. May be involved in lipid metabolism. a 1,2-diacyl-sn-glycero-3-phosphate + H2O = a 1,2-diacyl-sn-glycerol + phosphate Homodimer. This complex seems not to be involved in substrate recognition, it may confer only structural or functional stability. Expressed in embryonic gut in a pattern that guides germ cells towards mesoderm (initially in hindgut and then on lower side of gut). During extended germ band stage, expressed in ectoderm as a medial band throughout the trunk. Belongs to the PA-phosphatase related phosphoesterase family.