Yersinia: antigenic structure FI Antigen: capsule antigen V, WAntigen: anti-phagcytosis Yersinia Outer membrane Protein (Yop) Murine Toxin (Mt), good antigenicity, could be used to prepare toxoid and to immunize animals to get antI-toxin Endotoxin (LPs)Yersinia: antigenic structure • F1 Antigen: capsule antigen • V,W Antigen: anti-phagcytosis • Yersinia Outer membrane Protein (Yop) • Murine Toxin (MT), good antigenicity, could be used to prepare toxoid, and to immunize animals to get anti-toxin • Endotoxin (LPS)