Abstract
Using a polyclonal antibody raised against purified luciferase of Vibrio harveyi and immunogold labeling on thin sections, the amounts and cellular localization of luciferase were examined during the growth of the bacteria. Cells harvested at different times during cultivation in liquid medium at 22°C were fixed, either chemically or by fast freeze fixation followed by freeze substitution, and embedded in LR White. Concomitant measures of bioluminescence, both in vitro and in vivo,showed the classical curve of autoinduction. The number of gold particles per cell area showed a similar pattern. Their localization was always cytoplasmic, with no indication of special periplasmic or membrane associations.
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