Ontogenic pattern of nucleobindin-2/nesfatin-1 expression in the gastroenteropancreatic tissues and serum of Sprague Dawley rats

► NUCB2/nesfatin‐1 shows a tissue specific developmental expression in rats. ► Serum NUCB2/nesfatin‐1 is highest in adult rats. ► All islet beta cells colocalize nesfatin‐1 in adults, but not during development.