Fig. 2From: Construction of ultrasonic nanobubbles carrying CAIX polypeptides to target carcinoma cells derived from various organsDual-fluorescence validates targeted nanobubbles. a DiI-labeled targeted nanobubbles. b Nanobubbles carrying the FITC-modified polypeptides. c Merged image confirms that biotin–streptavidin system successfully linked the polypeptides to the surfaces of targeted nanobubblesBack to article page