ENG and Alzheimer disease: The detection of the CD105 as a signature marker in proteomic analysis was somewhat puzzling, such as it showed a similar amount by flow cytometry in cells from different sources: 95.4% ± 3.3 of HDFa, 92.4% ± 2.9 of DPSCs, and 91.3% ± 11.6 of AD-MSCs.