Buckley Mike, Walker Angela, Ho Simon Y W, Yang Yue, Smith Colin, Ashton Peter, Oates Jane Thomas, Cappellini Enrico, Koon Hannah, Penkman Kirsty, Elsworth Ben, Ashford Dave, Solazzo Caroline, Andrews Phillip, Strahler John, Shapiro Beth, Ostrom Peggy, Gandhi Hasand, Miller Webb, Raney Brian, Zylber Maria Ines, Gilbert M Thomas P, Prigodich Richard V, Ryan Michael, Rijsdijk Kenneth F, Janoo Anwar, Collins Matthew J
BioArch, Departments of Biology, Archaeology, Chemistry and Technology Facility, University of York, Post Office Box 373, York YO10 5YW, UK.
Science. 2008 Jan 4;319(5859):33; author reply 33. doi: 10.1126/science.1147046.
We used authentication tests developed for ancient DNA to evaluate claims by Asara et al. (Reports, 13 April 2007, p. 280) of collagen peptide sequences recovered from mastodon and Tyrannosaurus rex fossils. Although the mastodon samples pass these tests, absence of amino acid composition data, lack of evidence for peptide deamidation, and association of alpha1(I) collagen sequences with amphibians rather than birds suggest that T. rex does not.
我们使用为古代DNA开发的鉴定测试，来评估阿萨拉等人（《科学》，2007年4月13日，第280页）从乳齿象和霸王龙化石中回收的胶原蛋白肽序列的说法。尽管乳齿象样本通过了这些测试，但缺乏氨基酸组成数据、肽脱酰胺化的证据，以及α1(I)胶原蛋白序列与两栖动物而非鸟类的关联表明霸王龙样本未通过测试。
