Objective:To identify the differentially expression of the gene perforin from the subtracted libraries between asymptomatic HBV carriers(ASCs) and the normal control subjects.

• 目的:验证无症状乙型肝炎病毒携带者(A SC s)与正常对照组消减文库中的差异基因穿孔素(perforin)在相应人群中的差异表达。