Predicted to enable disulfide oxidoreductase activity and identical protein binding activity. Predicted to be involved in brain development. Predicted to be located in endoplasmic reticulum membrane; mitochondria-associated endoplasmic reticulum membrane; and mitochondrion. Predicted to be active in membrane-bounded organelle. Is expressed in several structures, including alimentary system; early conceptus; genitourinary system; immune system; and nervous system. Orthologous to human TMX2 (thioredoxin related transmembrane protein 2). [provided by Alliance of Genome Resources, Apr 2022]