Figure 2
Amino acid analyses. (A) Amino acid compositions and D/L values for the taphonomic experiments and fossil analyses. (B,C) Comparisons of the amino acid compositions of taphonomic experiments and fossil analyses (this paper) to dust49, human sweat50,51, and human fingerprints/fingertips33,34,52, using only the amino acids Asx, Glx, Ser, Thr, His, Arg, Ala, Val, Leu, Ile. These 10 amino acids were the only ones for which previously-published data was provided for common amino acid contaminants; the compositions from our experimental and analytical samples were recalculated using only these ten amino acids. (B) Principal component analysis (PCA). (C) Amino acid compositions.
