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Expression of the R1 and R2 regions of P97 in E. rhusiopathiae YS-19. Western immunoblots were developed with either anti-P97 rabbit serum (diluted 1:100) or anti-SpaA.1 rabbit serum (diluted 1:2,000) (27). Molecular size markers (in kilodaltons) are shown on the left. Data are not shown for YS-24.
