“…Clock genes are expressed in all regions of the gut in rodents, from the stomach to the caecum and predominantly in enterocytes[50]. Clock , Bmal1 , Per1 , Per2 , Cry1 , Cry2 , ReverbA and ReverbB have all been found to exhibit diurnal rhythmicity in rodent jejunal mucosa[51] with a similar phase compared to the liver but a phase delay of approximately 6 hours compared to the SCN[41, 43, 52, 53]. Several studies have subsequently confirmed that the transcriptional rhythmicity of some of these genes is matched by rhythmicity in protein expression[45, 54, 55].…”