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Immunohistochemical staining for HCN2 and AC1. Positive HCN2 (green) and AC1 (red; FLAG antibody) staining were detected in the injected LBB from animals that received the corresponding adenovirus. Nuclei were stained blue using 4',6-diamidino-2-phenylindole (DAPI). Bars represent 50 μm.
