E . coli xl1 - blue cells were tansformed by psurfpga and phages were rescued by m13ko7 helper phage particles . results showed that the heterodimeric enzyme was expressed as a fusion protein that matures to an active biocatalyst connected to the coat protein of phage fd 以构建的噬菌粒psurfpga转化具有琥珀突变的大肠杆菌xl1 - blue ，以辅助噬菌体m13k07超感染，进行青霉素g酰化酶基因的表达和在噬菌体表面的展示。
