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Separate spatially resolved analyses by Raman spectroscopy and transmission electron microscopy confirmed the ellipsoid microstructure localization of i) porphyrin signals of heme and ii) key elements of heme (Fe, N, and C) and mineral stabilizing hausmannite (Mn\n                    <jats:sub>3<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    ), respectively. These results demonstrate blood-derived biomolecules in mineralized red blood cells of a dinosaur.\n                  <\/jats:p>","DOI":"10.1073\/pnas.2614248123","type":"journal-article","created":{"date-parts":[[2026,11,2]],"date-time":"2026-11-02T20:01:56Z","timestamp":1793649716000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":1,"title":["Heme signatures in mineralized red blood cells within vascular canals of a 115-million-year-old dinosaur bone"],"prefix":"10.1073","volume":"123","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2136-3508","authenticated-orcid":false,"given":"Kliti","family":"Grice","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02n415q13","id-type":"ROR","asserted-by":"publisher"}],"name":"Western Australian Organic and Isotope Geochemistry Centre, Curtin University","place":["Perth, Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4784-6316","authenticated-orcid":false,"given":"Yuta","family":"Isaji","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/059qg2m13","id-type":"ROR","asserted-by":"publisher"}],"name":"Biogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology","place":["Yokosuka, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3581-1711","authenticated-orcid":false,"given":"Jasmina","family":"Wiemann","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/00za53h95","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Earth and Planetary Sciences, Johns Hopkins University","place":["Baltimore"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul F.","family":"Greenwood","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02n415q13","id-type":"ROR","asserted-by":"publisher"}],"name":"Western Australian Organic and Isotope Geochemistry Centre, Curtin University","place":["Perth, Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1128-6687","authenticated-orcid":false,"given":"Madison","family":"Tripp","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02n415q13","id-type":"ROR","asserted-by":"publisher"}],"name":"Western Australian Organic and Isotope Geochemistry Centre, Curtin University","place":["Perth, Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria A.","family":"Diaz Mateus","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02n415q13","id-type":"ROR","asserted-by":"publisher"}],"name":"Western Australian Organic and Isotope Geochemistry Centre, Curtin University","place":["Perth, Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4909-1666","authenticated-orcid":false,"given":"Stephen F.","family":"Poropat","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02n415q13","id-type":"ROR","asserted-by":"publisher"}],"name":"Western Australian Organic and Isotope Geochemistry Centre, Curtin University","place":["Perth, Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5770-0943","authenticated-orcid":false,"given":"Xiao","family":"Sun","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02n415q13","id-type":"ROR","asserted-by":"publisher"}],"name":"John de Laeter Centre, Curtin University","place":["Perth, Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9345-923X","authenticated-orcid":false,"given":"Calum P.","family":"Fox","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/059qg2m13","id-type":"ROR","asserted-by":"publisher"}],"name":"Biogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology","place":["Yokosuka, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luke M.","family":"Brosnan","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02n415q13","id-type":"ROR","asserted-by":"publisher"}],"name":"Western Australian Organic and Isotope Geochemistry Centre, Curtin University","place":["Perth, Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4576-0989","authenticated-orcid":false,"given":"Renan A. 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