Acts upstream of or within cell differentiation involved in salivary gland development; hematopoietic progenitor cell differentiation; and negative regulation of inflammatory response. Predicted to be located in extracellular region. Is expressed in sublingual gland; sublingual gland epithelium; and submandibular duct. Used to study Sjogren's syndrome. Orthologous to human MUC19 (mucin 19, oligomeric). [provided by Alliance of Genome Resources, Apr 2022]