Predicted to enable identical protein binding activity. Acts upstream of or within several processes, including epithelial cell development; negative regulation of cell migration; and positive regulation of apoptotic process. Located in extracellular matrix; inner mucus layer; and outer mucus layer. Is expressed in ileum and intestine. Used to study inflammatory bowel disease. Human ortholog(s) of this gene implicated in asthma. Orthologous to human MUC2 (mucin 2, oligomeric mucus/gel-forming). [provided by Alliance of Genome Resources, Apr 2022]