Fig. 1From: Supplemental invasion of Salmonella from the perspective of Salmonella enterica serovars Kentucky and TyphimuriumOrientation of mutations in SPI1. The 3′ region of Salmonella Pathogenicity Island I. Three deletion mutation events were designed to target structural genes between Ha, b, c and H2 and are designated as gray arrows. The 40-nt homology extensions are designated Ha, Hb, Hc, and H2Back to article page