As for the priS gene, our prediction is that future genome sampling will only uncover adhE genes among microbial taxa since the distribution of adhE is restricted to microbial eukaryotes.
Research efforts should not be restricted to a deeper understanding of relevant microbial reactions, but also include their interactions with the large array of other relevant phenomena, as a function of the truly variable site-specific conditions.
The occurrence of dypingite is restricted to the benthic microbial mats where cyanobacteria appear to create ideal conditions for carbonate formation as discussed later.
Contrary to the multicomponent photosynthetic reaction centers, which are restricted to six bacterial phyla, single-molecule microbial rhodopsins show wide taxonomic distribution, possibly through horizontal gene transfer between domains and phyla (Bryant and Frigaard 2006; Sharma et al. 2006; Bryant et al. 2007).
Most epidemiological studies with microbial exposure assessment among children have been restricted to studies on endotoxin (2) or have used only a limited set of microbial markers (3– 7).
To date, however, their production has been restricted to petroleum-based chemical industry and sugar-based microbial fermentation, limiting its sustainability and economical feasibility.
For microbial organisms, this approach was restricted to the minority that could be grown in pure culture in the laboratory until Norm Pace and colleagues showed that one could sequence rRNAs directly from environmental samples [6], [7].
In the last decade, works on microbial molybdenum reduction to Mo-blue have been restricted to our isolates [ 18– 25, 35, 36, 42].
In humans, TRAP expression is restricted to activated macrophages where it aids in the generation of free radicals to enhance microbial killing [ 31].
