{"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Growth hormone (GH or somatotropin) is a 191 amino acid, single-chain polypeptide hormone which is synthesized, stored and secreted by the somatotroph cells within the lateral wings of the anterior pituitary gland, which stimulates growth and cell reproduction in humans and other animals. GH is a useful marker in the study of pituitary tumors and pituitary disease such as acromegaly."}]}]}