They also note that upper gastrointestinal symptoms alone should not be used to determine gastric content. In my opinion, these guidelines offer much better and clearer recommendations
S.Gomez-PazS.KicielinskiK
Other genes, although with ARE motifs, present CpG islands in their proximal promoters such as GCLC and GCLM, which are characterized by significant association of active histone codes such as H3K4Me1-3, H3K9Ac, H3K27Ac, and H3K79Me2, suggesting a regulatory role of CpG islands in chromatin modifications
The human gut is a complex structure and is inhabited by trillions of microorganisms including bacteria, fungi, viruses, eukaryotes, and archae