Re: [dinosaur] Tyrannosaurus rex soft tissue and protein preservation mechanism (free pdf)n

 A news story:

Mechanisms of soft tissue and protein preservation in Tyrannosaurus rex

https://urldefense.proofpoint.com/v2/url?u=https-3A__phys.org_news_2019-2D11-2Dmechanisms-2Dsoft-2Dtissue-2Dprotein-2Dtyrannosaurus.html&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=pIcuf-AL3JACHpqvev1hMjJ1RO8hnIq5Oq9HWUwyQ30&s=hVE2gk8eWI5rZJKOCWLgwfhvQzFzKcyZGEd298O5MAY&e= 

On Wed, Oct 30, 2019 at 7:38 AM Ben Creisler <[email protected]> wrote:

>
> Ben Creisler
> [email protected]
>
> A new paper with free pdf:
>
> ============
>
> Elizabeth M. Boatman, Mark B. Goodwin, Hoi-Ying N. Holman, Sirine Fakra,
> Wenxia Zheng, Ronald Gronsky & Mary H. Schweitzer (2019)
> Mechanisms of soft tissue and protein preservation in Tyrannosaurus rex.
> Scientific Reports 9, Article number: 15678
> doi: https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1038_s41598-2D019-2D51680-2D1&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=pIcuf-AL3JACHpqvev1hMjJ1RO8hnIq5Oq9HWUwyQ30&s=RrTFNmYILMO78vUl50DGuFSjccoi239uNMm-QXXYfBc&e= 
> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.nature.com_articles_s41598-2D019-2D51680-2D1&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=pIcuf-AL3JACHpqvev1hMjJ1RO8hnIq5Oq9HWUwyQ30&s=iRujEYWnPkiUm49CmFDTPN2JzpQgwS9m7tMUveVpTu4&e= 
>
> Free pdf:
> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.nature.com_articles_s41598-2D019-2D51680-2D1.pdf&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=pIcuf-AL3JACHpqvev1hMjJ1RO8hnIq5Oq9HWUwyQ30&s=S4h77ImgrKIb6lFCm6KPUTOTIxpRJGoue75hXLFSvz8&e= 
>
>
> The idea that original soft tissue structures and the native structural
> proteins comprising them can persist across geological time is
> controversial, in part because rigorous and testable mechanisms that can
> occur under natural conditions, resulting in such preservation, have not
> been well defined. Here, we evaluate two non-enzymatic structural protein
> crosslinking mechanisms, Fenton chemistry and glycation, for their possible
> contribution to the preservation of blood vessel structures recovered from
> the cortical bone of a Tyrannosaurus rex (USNM 555000 [formerly, MOR 555]).
> We demonstrate the endogeneity of the fossil vessel tissues, as well as the
> presence of type I collagen in the outermost vessel layers, using imaging,
> diffraction, spectroscopy, and immunohistochemistry. Then, we use data
> derived from synchrotron FTIR studies of the T. rex vessels to analyse
> their crosslink character, with comparison against two non-enzymatic Fenton
> chemistry- and glycation-treated extant chicken samples. We also provide
> supporting X-ray microprobe analyses of the chemical state of these fossil
> tissues to support our conclusion that non-enzymatic crosslinking pathways
> likely contributed to stabilizing, and thus preserving, these T. rex
> vessels. Finally, we propose that these stabilizing crosslinks could play a
> crucial role in the preservation of other microvascular tissues in skeletal
> elements from the Mesozoic.
>
> ===============
>
>
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