Figure 2

(a) Genetic organization of the O-antigen gene clusters of A. hydrophila strains. GT represents the glycosyltransferase gene, AT represents the acetyltransferase gene, hyp represents the gene encoding the hypothetical protein. (b) Genetic organization of partial gene clusters of RGP3, RGP13 and RGP15. (I) depicts the myo-inositol utilization gene clusters; (II) depicts the sialic acid and L-fucose utilization gene clusters and oppABCD gene clusters; and (III) depicts the ssuABC and fecBCE gene clusters. Hyp represents the gene encoding the hypothetical protein. (c) Proposed utilization pathways for myo-inositol, sialic acid and L-fucose in A. hydrophila. The three proposed utilization pathways were modified according to previous studies18,19,26 and the genome annotation in KEGG pathway database. IolJ was not identified in A. hydrophila.