Most peptide and protein hormones are synthesized as
A secretagogue
A pleiotropic hormone
Proopiomelanocoin (POMC)
A preprohormone
Preprohormones are the gene products for most peptide and protein hormones. These are rapidly cleaved to form prohormones. POMC and propressophysin are two examples of specific prohormones.Ref: Guyton; 13th edition
General physiology