New discoveries in examining the fossils from the T-Rex have confirmed traces of protein from blood and bone, tendons, or cartilage. The dinosaur, which roamed the Earth about 68 million years ago, has been under ongoing scrutiny over which biochemical remnants are detected in its remains.
The study, led by Marshall Bern, Brett S. Phinney and David Goldberg, find that in a first 
analysis from 2007 in a fossilized Tyrannosaurus Rex bone which found traces of 7 distinct peptides from collagen is incorrect. Instead, the latest findings suggest that it was a fluke or result from contamination from another sample.
The reanalysis of the data reports, and clears, the error: “In summary, we find nothing obviously wrong with the T. rex mass spectra: 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.”
They believe that the previous evidence, which included immunological reactions, was perhaps causes by a bird dying on top of the T.rex.
In addition to clearing misconceptions of the deadly dino, it also helps to integrate more accurate forms of scientific study with lab samples.
The findings are scheduled for publication in the September 4th issue of the Journal of Proteome Research, just a portion of the ongoing controversy over which biochemical remnants can be detected in the Tyrannosaurus Rex.
Source: pubs.acs.org
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Marlene Affeld, on August 5th, 2009 says:
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