Note. The loading scores for each protein were weighted by the percent variance explained by the corresponding Principal Component and then summed to give the Total Loading Score (TLS) for each protein. The top 5% proteins based on their TLS were identified as the most prominent contributors in each group. (A) All individuals (N=40, 49% of hair protein variability), (B) All individuals including keratins and KAPs (N=40, 64.3% variability); (C) All mothers (n=8, 89.5% variability); (D) All children (n=32, 57.5% variability); (E) Mothers (n=8) and their biological children (n=16) (49.3% variability), and (F) Mothers (n=8) and unrelated children (n=16) (64.6% variability).