【目的】 确定肺炎链球菌表面粘附素A(PsaA)蛋白抗原的B细胞、CD4 T细胞和CD8 T细胞表位。【方法】 通过生物信息学方法预测肺炎链球菌PsaA蛋白分子小鼠B细胞线性表位、MHC-Ⅰ结合肽(CD8 T细胞表位)及MHC-Ⅱ结合肽(CD4 T细胞表位)并人工合成相应肽段;克隆重组质粒BL21/pET/PsaA并得到纯化的rPsaA蛋白用以免疫小鼠;分离每只免疫组和对照组小鼠的血清分别与人工合成的候选B细胞表位肽段进行间接ELISA检测,筛选B细胞表位 ...
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