Predicted to enable dystroglycan binding activity; epidermal growth factor receptor binding activity; and identical protein binding activity. Predicted to be involved in several processes, including mucus secretion; positive regulation of protein localization to plasma membrane; and positive regulation of signal transduction. Predicted to act upstream of or within lung goblet cell differentiation. Predicted to be located in extracellular space. Predicted to be active in endoplasmic reticulum. Orthologous to human AGR2 (anterior gradient 2, protein disulphide isomerase family member). [provided by Alliance of Genome Resources, Apr 2022]