目的调查献血者人群中H抗原缺失血型的表型频率，研究其血清学和遗传学特征。
Objective Survey the frequency of H deficient phenotype in blood donor population and analyze the serological and genetic characteristics of these individuals.
目的：对炭疽毒素保护性抗原（PA）的不同结构域进行了缺失突变，以期找到免疫原性降低而功能变化不大的PA蛋白突变体。
Objective:To find protective antigen(PA) defective mutants of anthrax toxin with the same function as PA but with low immunogenicity, different domains of PA were mutated.
目的：研究O抗原“缺失”的宋内志贺菌其它生物学性状的变化情况。
Objective:To study the other properties of Shigella sonnei with "no" O antigen.
有证据显示排行第四的区域，第2对染色体上的SP140，可能影响对免疫缺失病毒第一型的反应，并因此可能影响对其它抗原刺激的反应。
There are indications that the fourth-ranked region, SP140 on chromosome 2, may influence the response to immunodeficiency virus type 1 and so may affect the response to other antigenic challenges.
有证据显示排行第四的区域，第2对染色体上的SP140，可能影响对免疫缺失病毒第一型的反应，并因此可能影响对其它抗原刺激的反应。
There are indications that the fourth-ranked region, SP140 on chromosome 2, may influence the response to immunodeficiency virus type 1 and so may affect the response to other antigenic challenges.
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