Fig. 5From: Functional insights from targeted imaging BACE1: the first near-infrared fluorescent probe for Alzheimer’s disease diagnosisThe penetrating blood-brain barrier ability of HBAE was evaluted by transwell experiment and showed that HBAE showed ideal permeability. U87-MG cells in the lower layer is obvious stained by HBAE. Scale bar = 50 μmBack to article page