Additional file 8b: Alignment of the amino acid sequences of RhsI proteins located downstream of the the rhsD genes found in the viscinity of the type VI secretion system-1 gene cluster of different strains of Pantoea ananatis. Alignments were done in MEGA5 using ClastalW with the default settings. Corresponding author: Teresa Coutinho, Teresa.Coutinho@up.ac.za