To test for gene specific demethylation, we transfected a methylated EGFP expression plasmid and monitored its methylation status by digestion with the methylation sensitive endonuclease HpaII.
PCR amplification of the converted fragment leads to creation of new, or loss of existing, restriction site (s), and susceptibility or resistance to selected restriction enzyme digestion reveals the methylation status of the original DNA fragment.
The method we use here, combined bisulfite and restriction analysis (CoBRA), exploits site-specific enzyme digestion to determine methylation status.
The MQ has been shown to be indicative of the fermenter status during mesophilic digestion of maize silage; an increase of MQ values to above 3 due to TE deficiency was observed already ca. 2 weeks before detectable changes of conventional chemical process indicators such as the TVA/TIC ratio or the concentrations of SCFAs [63, 67].
However, a clade of sequences lacking any described taxon and branching off at the class or order level was identified (UC-II in Figure 1, sequences not only found in maize digestion) to which accordingly the status of a novel class or order should be given.
Different digestion patterns revealed different methylation status, especially different levels of de-methylation, that are the consequence of the in vitro culture.
The restriction site NotI (GCGGCCGC) is frequently located in CpG-islands within promoter regions and is thus the sensitivity to NotI digestion that reflects the methylation status of the surrounding genes/loci [ 54].
The results showed that high-solids anaerobic digestion can evolve successfully from low-solids status.
Molecular analyses of genomic deoxyribonucleic acid were successful for the identification of human papillomavirus E6 and p53 polymorphism status by means of restriction enzyme digestion and direct sequencing.
The plasmids were methylated using M. sssI CpG methyltransferase in vitro and the methylation status was confirmed by HpaI/HhaII digestion (Figure S2).
