Predicted to enable cobalamin binding activity. Predicted to be involved in cobalamin transport. Predicted to act upstream of or within cobalt ion transport. Located in extracellular space. Is expressed in eye and genitourinary system. Human ortholog(s) of this gene implicated in Parkinson's disease; megaloblastic anemia; and transcobalamin II deficiency. Orthologous to human TCN2 (transcobalamin 2). [provided by Alliance of Genome Resources, Apr 2022]