Thyrotrophin-releasing hormone molecule. Computer model showing the structure of Thyrotrophin-releasing hormone (TRH). Atoms are colour-coded spheres (carbon: dark grey, hydrogen: light grey, nitrogen: blue, and oxygen: red). TRH is produced by the hypothalamus in the brain. It controls the production of thyroid-stimulating hormone (TSH), which stimulates the thyroid gland to secrete the hormones thyroxine and tri-iodothyronine.
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