An international team of researchers said that it has identified how a particular gene, called fatty acid binding protein 7 (FABP7), is involved in its quality sleeping three different animals, including humans, reports the Weekly Observer.

“Sleep should serve some important function. But as scientists we still have not understood it anymore. One way to get to this is by understanding how it is regulated, or what processes exist that are common to all kinds, “the researchers said in their study.

The researchers in their new study looked at genes that changed their expression during the sleep-wake cycle, and found that the expression of the FABP7 gene was changing over the day into the mouse brain.