antigen selection hypothesis 抗原选择假说
Because thymic dendritic cells are the potent antigen presenting cells in the thymus, they must play an important role in thymic negative selection.
胸腺树突状细胞作为胸腺内功能强大的抗原呈递细胞，在阴性选择中必定发挥着不可忽视的作用。
Objective:To construct a recombinant plasmid containing rhoptry protein 2(ROP2)gene of Toxoplasma gondii and express it in E. coli for selection of diagnostic antigen and vaccine candidate.
目的：构建弓形虫棒状体蛋白（ROP2 ）基因重组质粒并在大肠杆菌中表达，用于筛选弓形虫新的诊断抗原和疫苗分子。
A rapid method for the detection of NSE antigen were established through the selection of tumor markers of lung cancer and gold nanoparticles.
同时利用筛选得到的肺癌肿瘤标志物a适配子和纳米金颗粒建立一种快速检测NSE抗原的方法。
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