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Effect of occult hepatitis B surface antigen variants on the reactive oxygen species system. The reactive oxygen species level according to the occult hepatitis B virus variants in transient transfected HuH-7 was measured using 20 μmol/L of DHR123 reagent, which can detect reactive oxygen species (ROS) such as peroxide and peroxynitrite. The tests were performed in triplicate (mean ± SD). aP < 0.05, bP < 0.01 vs wild type (Nor) group.
