The encoding genes of IgG binding domains of staphyloccal protein A(SPA)nd streptococcal protein G (SPG)were cloned and expressed as fusion protein using pGEX vector of E. coli.

• 葡萄球菌A蛋白（SPA）和链球菌G蛋白（SPG）的IgG结合区编码基因融合后，克隆到大肠杆菌表达载体PGEX，SPA/SPG融合蛋白（SPAG）得到高效表达。