Complete ACTH is adreno-cortico-tropic-hormone, and its main physiological function is to maintain the normal shape and function of the adrenal glands. The synthesis and secretion of ACTH is carried out in the basophils of the adenohypophysis under the action of the hypothalamic corticotropin releasing hormone (CRH) in the anterior pituitary. ACTH (1-13) produced by peptide synthesis technology selected the first 13 amino acids at the N-terminal to condense to form fragments. ACTH (1-13) is of great significance to the study of ACTH.