Methods The nucleotide sequences of X and precore/core genes of serum HBV were cloned and sequenced in 14 asymptomatic carriers (AsCs) and 14 chronic active hepatitis (CAH) patients with antibody against hepatitis B e antigen.

• 方法 对e抗体阳性14例无症状携带（AsC）者及e抗体阳性14例慢性活动性肝炎（CAH）患者的血清HBV X及前C/C基因序列进行克隆、测序。