Beatrice Demarchi

@beademarch.bsky.social

Bioarchaeologist|archaeobiologist, ancient proteins. PI@archaeobiomics.bsky.social‬

A couple of Ansers on the age-old question of "taxonomic resolution" in palaeoproteomics: new preprint by our group shows that we need much better reference data and more than a pinch of caution when attempting phylogenetic reconstructions www.researchsquare.com/article/rs-5...

New avian protein sequences improve resolution of palaeoproteomic approaches to taxonomic identification & reveal widespread intraspecies variability

Biomolecules offer unparalleled insights into ancient life, from evolutionary pathways of organisms to the health and cultural practices of our ancestors. Biomineral-associated proteins, such as thos...

researchsquare.com

Matthew Collins@matthewcollins.bsky.social · last yr.

An important new paper by @beademarch.bsky.social and her team challenges how we use ancient proteins to study the past. Analysis of 1,832 sequences from waterfowl (ducks & geese) reveals why palaeoproteomics isn't the simple solution we hoped for... 👇🧵 1/4 www.researchsquare.com/article/rs-5...

A circular phylogenetic tree displaying the protein annotation patterns across 160 Anatidae (waterfowl) genomes. The tree branches radiate from the center, with each tip representing a different species. The outer ring consists of colored dots representing 13 different proteins, with black dots indicating >70% complete sequences, pink dots showing <70% complete sequences, and white dots showing no annotation. The samples are grouped and colored by genus, with major genera like Aythya, Spatula, Mergus, Chloephaga, Tadorna, and MelanitaSomateria labeled. Below the tree, a legend shows sequence counts and mean coverage percentages for each protein, ranging from 81-168 sequences and 79.9%-99.9% coverage. A node score legend indicates bootstrap support values using different shades of grey."

The deadline for the ISBA11 abstract submission is quickly approaching! We welcome all submissions on biomolecular archaeology, and we hope to see you all in Turin this summer!

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