Predicted to enable death receptor binding activity and tumor necrosis factor receptor binding activity. Acts upstream of or within extrinsic apoptotic signaling pathway via death domain receptors and retinal cell programmed cell death. Located in external side of plasma membrane. Is expressed in several structures, including alimentary system; brain; hemolymphoid system gland; reproductive system; and trophectoderm. Used to study autoimmune lymphoproliferative syndrome and type 1 diabetes mellitus. Human ortholog(s) of this gene implicated in several diseases, including cholangiocarcinoma; chronic myeloid leukemia; diabetes mellitus (multiple); pancreatic cancer (multiple); and pre-eclampsia (multiple). Orthologous to human FASLG (Fas ligand). [provided by Alliance of Genome Resources, Apr 2022]