Number of Acidic Residues.

Abstract

<p><b><u>Chemical characteristics of fossil peptides.</u></b> Dinosaur peptide sequences were obtained from the literature and their alpha chain location and amino acid positions on the human collagen model determined. The prevalence of acidic residues (<i>bolded, underlined</i>) in the peptides was lower than predicted for “average” peptides of comparable lengths from pepsinized human collagen <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0020381#pone.0020381-Miller1" target="_blank">[38]</a>, implying that regions of collagen with a less acidic nature were preferentially preserved in the fossils.</p