Amino acid content of IRSNB 1624 (two batches).

<p>The majority of the amino acids present are aspartic acid, serine, glutamic acid, glycine, and alanine. Together, these amino acids make up approximately 60% of the residues in modern collagen <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0019445#pone.0019445-Tuross1" target="_blank">[19]</a>. Additionally, the molecular composition of collagen incorporates glycine at every helical turn, resulting in a high concentration of this amino acid <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0019445#pone.0019445-Tuross1" target="_blank">[19]</a>, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0019445#pone.0019445-Manning1" target="_blank">[35]</a>. Low resolution and co-extraction contaminants prevented analysis of amino acids in the 440 nm region (such as proline and hydroxyproline).