In the previous works about graphite and anatase TiO2 Raman bands (ChemRxiv1, ChemRxiv2), we have considered the deconvolution of the Raman spectra, subdividing them into several frequency ranges. This choice has an evident convenience, allowing a greater detail in deconvolution. However, there is a further subtle reason for this choice, and here it is necessary to stress it. The intensity of the spectrum (intensity axis, y-axis) is proposed as a function of the Raman shift (frequency axis, x-axis). The spacing of x-axis can be not constant. This is the case of the data provided by Sherman et al. For instance, over the range 583.3-766.5 cm -1 of Fig. (L-Cysteine), the x-axis spacing changes of 2%. In the case of the range 551-779 cm -1 of Fig. (Cysteamine), the spacing changes of 2.4%. On the band of the peak at 633 cm -1 , the spacing variation is of about 1.2%. If we consider, as we did in the fitting approach, the data as equally spaced, we induce a slight asymmetric effect of about 0.6% which is clearly negligible, when compared to the 10.5% asymmetry of this peak at its half maximum.