Predicted to enable endoribonuclease activity and single-stranded DNA endodeoxyribonuclease activity. Acts upstream of or within several processes, including apoptotic DNA fragmentation; in utero embryonic development; and response to tumor necrosis factor. Located in mitochondrion. Is expressed in several structures, including central nervous system; gut; liver; male reproductive gland or organ; and respiratory system. Orthologous to human ENDOG (endonuclease G). [provided by Alliance of Genome Resources, Apr 2022]