Updated project metadata. The project aimed to characterize the protein composition from 3 Pleistocene bone specimens (AR-7, AR-16, AR-30). Analysed extracts concern standard ZooMS tryptic digests (AR-7, AR-16, AR-30) and additional palaeoproteomic extracts (AR-30A and AR-30B). The latter concern two biological duplicates. All extractions were performed at the Department of Human Evolution, MPI-EVA (Germany) under sterile conditions. Analyses took place on a Q-Exactive Hybrid Quadrupole-Orbitrap MS.