Moffit-Yang equation

Generally, the Drude equation describes the optical activity of coil molecules the Moffit-Yang equation is more suitable for helices. 

Figure 12.3 shows a typical rotatory dispersion curve, where there is no maximum or minimum. Figure 12.4 shows a plot of m versus X, in which a protein in denatured form is compared with the same protein in native form. The plot of the Moffit-Yang equation s shown in Rgure 12.5. If a synthetic polypeptide is in a random conformation, the rotatory dispersion, which is simple, may be adequately expressed by a one-term Drude equation. If a synthetic polypeptide is in an ot-helical conformation, the Moffitt-Yang plot may be employed to describe the rotatory dispersion. 

The Moffit-Yang (1956) equation provides a different way to analyze experimental data and is given in the form... 

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