Predicted to enable calcium ion binding activity and lactose synthase activity. Predicted to act upstream of or within lactose biosynthetic process. Predicted to be located in extracellular region. Is expressed in several structures, including central nervous system; cranium; genitourinary system; integumental system; and sensory organ. Orthologous to human LALBA (lactalbumin alpha). [provided by Alliance of Genome Resources, Apr 2022]