PC, Phosphatidylcholines; PS, Phosphatidylserine; MTHF, 5,10-methylenetetrahydrofolate; THF, Tetrahydrofolate; GAc, Guanidinoacetate; Arg, Arginine; α-KG, α-ketoglutarate, also known as oxoglutarate; Asp, aspartate; OA, Oxaloacetate; TAC, tricarboxylic acid cycle, also known as citrate cycle. Red represents increased metabolites and green represents decreased metabolites in response to radiation.