The pps A gene encoding PpsA was obtained by polymerase chain reaction(PCR) and expressed in E.coli BL21 strain.SDS PAGE demonstrated that the band at 87 kD was more intensive than the same bands of the constract.The ...The pps A gene encoding PpsA was obtained by polymerase chain reaction(PCR) and expressed in E.coli BL21 strain.SDS PAGE demonstrated that the band at 87 kD was more intensive than the same bands of the constract.The specific activity of PpsA in crude extracts was increased 3.9 fold.展开更多
目的研究上海地区中国人群抗原肽运载体（transporter associated with antigen processing，TAP）基因与HBV感染以及慢性HBV感染和慢性肝炎并发肝硬化之间的相关性。方法收集临床病例，检测乙型肝炎病毒标志，参照“病毒性肝炎防治方案...目的研究上海地区中国人群抗原肽运载体（transporter associated with antigen processing，TAP）基因与HBV感染以及慢性HBV感染和慢性肝炎并发肝硬化之间的相关性。方法收集临床病例，检测乙型肝炎病毒标志，参照“病毒性肝炎防治方案-2000”，选取101例乙型肝炎病毒感染者，21例HBV感染康复者及113例正常对照，进行TAP2等位基因分型。对数据分组进行统计分析。结果慢性乙型肝炎组的TAP2＊0201基因频率显著低于感染恢复组（X^2=4．95，P〈0．03）；肝硬化组的TAP2＊0101基因频率显著高于正常对照组（X^2=5．72，P〈0．02）；在慢性乙型肝炎并发肝硬化组中DR4与TAP2＊0101等位基因间存在显著的连锁不平衡（△=0．026，P〈0．05）。结论TAP2＊0101等位基因型携带者易感慢性乙型肝炎和乙型肝炎并发肝硬化，而丁AP2＊0201则表现出对慢性乙型肝炎的抗性。两者均与HBV感染的预后似有一定相关。展开更多
文摘The pps A gene encoding PpsA was obtained by polymerase chain reaction(PCR) and expressed in E.coli BL21 strain.SDS PAGE demonstrated that the band at 87 kD was more intensive than the same bands of the constract.The specific activity of PpsA in crude extracts was increased 3.9 fold.
文摘目的研究上海地区中国人群抗原肽运载体（transporter associated with antigen processing，TAP）基因与HBV感染以及慢性HBV感染和慢性肝炎并发肝硬化之间的相关性。方法收集临床病例，检测乙型肝炎病毒标志，参照“病毒性肝炎防治方案-2000”，选取101例乙型肝炎病毒感染者，21例HBV感染康复者及113例正常对照，进行TAP2等位基因分型。对数据分组进行统计分析。结果慢性乙型肝炎组的TAP2＊0201基因频率显著低于感染恢复组（X^2=4．95，P〈0．03）；肝硬化组的TAP2＊0101基因频率显著高于正常对照组（X^2=5．72，P〈0．02）；在慢性乙型肝炎并发肝硬化组中DR4与TAP2＊0101等位基因间存在显著的连锁不平衡（△=0．026，P〈0．05）。结论TAP2＊0101等位基因型携带者易感慢性乙型肝炎和乙型肝炎并发肝硬化，而丁AP2＊0201则表现出对慢性乙型肝炎的抗性。两者均与HBV感染的预后似有一定相关。
