Abstract: | A method of calculation of the circular dichroism (CD) of random-coil polypeptides has been developed by means of a Monte-Carlo approach to the treatment of statistical systems and exciton theory of optical activity of polymers. The contribution of π–π* and n–π* amide transitions to the CD has been taken into account. The π–π* transition gives rise to two CD bands: a negative short-wavelength band and a weak positive long-wavelength one. The n –π* transition gives rise to one negative CD band. |