Comment on "Protein sequences from mastodon and Tyrannosaurus rex revealed by mass spectrometry". by Buckley, M, Walker, A, Ho, S, Yang, Y, Smith, C, Ashton, P, Oates, J, Cappellini, E, Koon, H, Penkman, K, Elsworth, B, Ashford, D, Solazzo, C, Andrews, P, Strahler, J, Shapiro, B, Ostrom, P, Gandhi, H, Miller, W, Raney, B, Zylber, M, Gilbert, M, Prigodich, R, Ryan, M, Rijsdijk, K