Predicted to enable protein disulfide isomerase activity and protein-disulfide reductase activity. Predicted to be involved in peptidyl-cysteine oxidation. Located in cell surface. Is expressed in embryo; eye; lens epithelium; retina; and retina outer nuclear layer. Orthologous to human TMX3 (thioredoxin related transmembrane protein 3). [provided by Alliance of Genome Resources, Apr 2022]