Figure 1. Characterization of Fe3O4, Fe3O4@PDA and MSCM-Fe3O4@PDA NPs. (A) TEM images of NPs. (B) DLS of NPs. (C) Zeta potential of NPs. (D) Stability analysis of NPs. (E) SDS-PAGE protein analysis of Fe3O4@PDA, Cell lysate, MSC membrane and MSCM-Fe3O4@PDA. (F) Membrane protein expressions of Fe3O4@PDA, Cell lysate, MSC membrane and MSCM-Fe3O4@PDA.