Fig. 2From: Effect of S-region mutations on HBsAg in HBsAg-negative HBV-infected patientsImmunofluorescence staining of HBsAg in Huh-7 cells transfected with wildtype and mutant plasmids. Intracellular HBsAg was stained by FITC (green), and the cell nuclei were stained with DAPI (blue). Magnification, ×400Back to article page