title: Chitin-protein complex in the Ordovician organic microfossil?
mesh_terms: D000818:Animals; D002686:Chitin / Q000378:metabolism*; D005580:Fossils; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D008867:Microtomy; D010163:Paleontology; D011506:Proteins / Q000378:metabolism*
chemical_list: D011506:Proteins; D002686:Chitin