To keep the natural biological activities of Chicken- derived Shigella IpaC protein to achieve secretory expression in Pichia pastoris expression system and further study biological function of IpaC protein,the IpaC# gene was optimized and synthesized according to the yeast codon preference without changing the amino acid sequence of IpaC protein in this research. The eukaryotic expression vectors p GAPZA- Inu /Inv / Kil / Lys / Mat / Amy / Glu / Ser- IpaC# were constructed using eukaryotic expression vecto...