Fig. S7.

Correspondence of the four zones determined by XRD to structural features of the human hair follicle. The criteria introduced by Er Rafik et al. (21) are used to divide the keratinization process of the follicle into four distinct zones. For every zone, a representative diffractogram is shown. The observed diffraction patterns are outlined in the corresponding text and the corresponding model with the characteristic spatial periods are shown as cartoons (Fig. 4A).