An antigen is any substance capable of eliciting an immune response when injected into a host animal . 抗原是任何注射于宿主动物体内都能引起免疫应答的物质。
If a piece of grafted skin contains an antigen different from the host's, the host will make antibodies against it . 如果一块移植的皮肤含有一种不同于宿主的抗原，宿主将产生抗体来对抗它。
No precipitate is formed if there is an extreme excess of antigen and in some systems, with an extreme excess of antibody . 如果在某些系统中，抗原极度过剩或抗体极度过剩，便不会形成沉淀。
Radioimmunoassy(ria)is one of the most sensitive tehniques presently available for the diagnosis of viral antigens or antibodies . 放射免疫试验（RIA）是目前适合于诊断病毒抗原或病毒抗体的最灵敏技术之一。
Vaccination with weakened or killed viruses arouses these antigens in exactly the same way, producing immunity without infection . 用减弱了的或者是死的病毒去接种，能同样地引出这些抗体，从而既产生免疫但又不发生感染疾病。
Tumor associated antigen immunological test systems 与瘤有关的抗原免疫学检测系统
The attraction between an antigen and an antibody 化合力抗原和抗体之间的相互吸引
Quantitative analysis of special literature on antigen cd 44专题文献计量分析
The research progress in antigen of helicobacter pylori 幽门螺杆菌保护性抗原研究进展
