Corticotropin-releasing (frequently misspelt corticotrophin-releasing) hormone (CRH) also known as Corticotropin-releasing factor (CRF) is a polypeptide hormone of 41 amino acids.
It is produced by the hypothalamus and stimulates corticotropic cells of the anterior lobe of the pituitary to production of ACTH and other biologically active substances (for example β-endorphin). CRH is also synthesized by the placenta and seems to determine the duration of pregnancy.
The sequence of amino acid residues was first determined by Shibahara in 1983.
Ser - Glu - Glu - Pro - Pro - Ile - Ser - Leu - Asp - Leu - Thr - Phe - His - Leu - Leu - Arg - Glu - Val - Leu - Glu - Met - Ala - Arg - Ala - Glu - Gln - Leu - Ala - Gln - Gln - Ala - His - Ser - Asn - Arg - Lys - Leu - Met - Glu - Ile - IleNH2