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Reexamination Of T. Rex Verifies Disputed Biochemical Remains

Date:
July 31, 2009
Source:
American Chemical Society
Summary:
A new analysis of the remains of a Tyrannosaurus rex (T. rex) that roamed Earth 68 million years ago has confirmed traces of protein from blood and bone, tendons, or cartilage. The findings is the latest addition to an ongoing controversy over which biochemical remnants can be detected in the dinosaur.

A new analysis of the remains of a T. rex has confirmed traces of protein from blood and bone, tendons, or cartilage.
Credit: Wikimedia Commons

A new analysis of the remains of a Tyrannosaurus rex (T. rex) that roamed Earth 68 million years ago has confirmed traces of protein from blood and bone, tendons, or cartilage. The findings, scheduled for publication in the Sept. 4 issue of the Journal of Proteome Research, is the latest addition to an ongoing controversy over which biochemical remnants can be detected in the dinosaur.

In the study, Marshall Bern, Brett S. Phinney and David Goldberg point out that the first analysis in 2007 of a well-preserved, fossilized T. rex bone identified traces of seven distinct protein fragments, or peptides, from collagen. That material is one of the primary components of bone, tendons and other connective tissue. However, later studies disputed that finding, suggesting that it was a statistical fluke or the result of contamination from another laboratory sample.

The scientists describe reanalysis of the T. rex data and also report finding evidence of substances found in collagen. "In summary, we find nothing obviously wrong with the Tyrannosaurus rex [analysis from 2007]," the report states. "The identified peptides seem consistent with a sample containing old, quite possibly very ancient, bird-like bone, contaminated with only fairly explicable proteins. Hemoglobin and collagen are plausible proteins to find in fossil bone, because they are two of the most abundant proteins in bone and bone marrow."


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Marshall Bern, Brett S. Phinney and David Goldberg. Reanalysis of Tyrannosaurus Rex Mass Spectra. Journal of Proteome Research, Sept. 4, 2009 [link]

Cite This Page:

American Chemical Society. "Reexamination Of T. Rex Verifies Disputed Biochemical Remains." ScienceDaily. ScienceDaily, 31 July 2009. <www.sciencedaily.com/releases/2009/07/090729103737.htm>.
American Chemical Society. (2009, July 31). Reexamination Of T. Rex Verifies Disputed Biochemical Remains. ScienceDaily. Retrieved August 1, 2014 from www.sciencedaily.com/releases/2009/07/090729103737.htm
American Chemical Society. "Reexamination Of T. Rex Verifies Disputed Biochemical Remains." ScienceDaily. www.sciencedaily.com/releases/2009/07/090729103737.htm (accessed August 1, 2014).

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