Effect of supplementing culture media with BMP2Pe or BMP2Pr grafted NPs on the expression of osteogenic (OP and OC) and vasculogenic (PECAM-1) markers. Fluorescent images on the left, center, and right show expression of OP (green), OC (light yellow), and PECAM (red), respectively. Groups include BMS cells cultured in basal media (A-OP, A-OC, A-PECAM), OM (B-OP, B-OC, B-PECAM), OM supplemented with BMP2Pe (C-OP, C-OC, C-PECAM), OM supplemented with BMP2Pe grafted NPs (D-OP, D-OC, D-PECAM), OM supplemented with BMP2 protein (E-OP, E-OC, E-PECAM), and OM supplemented with BMP2Pr grafted NPs (F-OP, F-OC, F-PECAM).