FIG. 4.

Comparison between levels of TDH and those of tdh-specific mRNA for tdh gene-bearing strains of V. parahaemolyticus. The level of TDH production in each strain is expressed as the TDH titer (explained in the text). The initial copy of the tdh-specific mRNA was determined from the calibration curve in the TRC reaction (Fig. 2B). Designations of the test strains are indicated in Table 1. The strains from 1 to 23 carried the tdh and trh (trh1 or trh2) genes. The strains from 24 to 59 carried the tdh gene alone.