The FTIR spectroscopy of charge transfer complexes of hormones, enzymes, enniatin B and beuvericin are studied here. The FTIR spectra of CTCs of hormones namely insulin, thyrotropin-releasing hormone, vasopressin and glucagon with organic acceptors is the subject of present study. It is found that these hormones are small band gap semiconductors except glucagon. The CTCs of these hormones with standard organic acceptors such as TCNQ, TCNE, DDQ, chloranil and iodine or KI-I2 are semiconductors having two band transports. Some of them are Peierls semiconductors while others have non-universal...