Exact(3)
This result is particularly intriguing, because it supports the theory of a gram positive origin of Bacteria [19] but proposes high G+C Bacteria (Actinobacteria) rather than low G+C ones (Firmicutes) in previous work [17], [20].
Along with strongly supporting the monophylies of three superkingdoms and most taxonomic sub-divisions, the derived tree also suggests some intriguing results, such as high G+C gram positive origin of Bacteria, classification of Symbiobacterium thermophilum and Alcanivorax borkumensis in Firmicutes.
Four phage endolysins of Gram positive origin (LysA, LysA2, LysgaY and λSa2 endolysin) demonstrate lysis of LAB at pH and ethanol concentrations similarly achieved during fuel ethanol fermentations.
Similar(57)
The resulting vector was devoid of the Gram-positive origin of replication.
pETSPO contains a Gram-positive origin of replication and was methylated before introducing into C. acetobutylicum, which significantly increased the chance of homologous recombination [36].
They suggest that archaea branched early from within bacteria, but their hypothesis is also consistent with a later gram-positive origin.
No differences were found within the first 24 hours; however, NK cell count was greater among patients with sepsis of Gram-positive origin than among patients with Gram-negative sepsis on days 7 and 14 [ 23].
Recently, Riedel et al. (2007a) constructed a novel vector (p16S lux), containing a temperature-sensitive Gram-positive origin of replication and a region of homology to the 16S rRNA gene.
If the root is, as shown here, beside or within Chlorobacteria, their tree supports instead the Gram-positive origin of neomura, as I first proposed [ 29], and contradicts the widespread assumption that Thermotoga and Aquifex are deeply diverging eubacteria or have any particular relationship to archaebacteria.
The work here also demonstrates the development of a C. pasteurianum genetic toolkit currently comprised of two selectable markers (catP-based thiamphenicol selection and ermB-based clarithromycin or erythromycin selection) and three Gram-positive origins of replication (pIM13 from Bacillus subtilis, pCD6 from C. difficile, and pCB102 from C. butyricum).
To electrotransform C. pasteurianum, we employed a series of E. coli- Clostridium shuttle vectors which differ only in their Gram-positive origins of replication: pMTL82151 (pBP1 ori from C. botulinum); pMTL83151 (pCB102 ori from C. butyricum); pMTL84151 (pCD6 ori from C. difficile); and pMTL85141 (pIM13 ori from Bacillus subtilis) [ 34].
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