Fig. 7

Schematic representation of the discovery mechanism of the radioprotective ability of L-citrulline. L-citrulline increases the citrullination of histone H3 (R17), which regulates the expression of Cxcl3. Cxcl3 has a radio-protective effect in intestinal cells. L-citrulline plays its role in radioprotection via H3Cit17-Cxcl3 axis