Extended Data Fig. 4: Deamidation rates in fossil rhinocerotid enamel proteomes, plotted against geological age.
From: Phylogenetically informative proteins from an Early Miocene rhinocerotid
Data used is CMFN-59632 from Haughton Crater (21.8 Ma), DM.5/157 from Dmanisi (1.77 Ma), CGG 1_023342 from Fontana Ranuccio (0.4 Ma), and a mediaeval control sample (0.005 Ma). While useful for establishing authenticity of an ancient proteome, deamidation rates plateau relatively quickly, so they are not reliable for assessing relative degradative state in ancient proteomes from deep geological timescales.
