FIG. 2.

Phylogenetic trees of the three housekeeping genes gyrB, recA, and pyrH (A) and the lux operon genes (B); luminescent taxa are shown in bold. The housekeeping gene analysis resulted in 36 equally parsimonious trees. Tree length, 8327; consistency index (CI), 0.247; retention index (RI), 0.675. The jackknife values are shown at the nodes; some values for V. vulnificus, V. cholerae, and V. chagasii clades were omitted for clarity. Parsimony analysis of the lux operon genes sequences resulted in a single tree: tree length, 14311; CI, 0.546; RI, 0.732. Each of the housekeeping genes separately yielded the same relationship of VVL1 to the other V. vulnificus strains (data not shown).