Enables identical protein binding activity. Involved in thyroid hormone generation. Acts upstream of or within iodide transport; regulation of myelination; and thyroid hormone metabolic process. Located in extracellular space. Is expressed in thyroid gland; thyroid gland follicle; thyroid gland left lobe colloid-filled follicles; thyroid gland lobe; and thyroid gland right lobe colloid-filled follicles. Used to study congenital hypothyroidism. Human ortholog(s) of this gene implicated in Graves' disease; autoimmune thyroiditis; goiter; and thyroid dyshormonogenesis 3. Orthologous to human TG (thyroglobulin). [provided by Alliance of Genome Resources, Apr 2022]