葡萄球菌细胞壁成分甲蛋白(Staphylococcal Protein A,SPA)具有能与人及多种哺乳动物血清中的IgG的Fc段非特异性结合的特点,引起免疫学家们的广泛兴趣,已在医学微生物学、免疫学、肿瘤学及细胞学等领域中应用,并已开始与放射免疫测定、免疫荧光及免疫电镜等技术相结合,进一步提高了SPA在免疫学上的价值。它具有特异性高、灵敏度强、操作简便、经济等优点。国内尚未见有关这方面的系统介绍及实验报 Staphylococcal Protein A (SPA), which has the characteristics of non-specific binding to the Fc of IgG in human and various mammalian sera, has attracted the widespread interest of immunologists and has been widely used in medical microbiology, Immunology, oncology and cytology and other fields, and has begun to combine with radioimmunoassay, immunofluorescence and immunoelectron microscopy and other technologies to further improve the SPA in the immunological value. It has high specificity, sensitivity, ease of operation, economy and so on. There is no domestic introduction of this system and experimental report