The pheB gene from Geobacillus stearothermophilus DSM6285 has been exploited as a reporter gene for Geobacillus spp. The gene product, catechol 2,3-dioxygenase (C23O), catalyzes the formation of 2-hydroxymuconic semialdehyde, which can be readily assayed. The reporter was used to examine expression from the ldh promoter associated with fermentative metabolism.
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Bartosiak-Jentys et al. (2012) studied this question.
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