Apaf1	Apoptotic protease activating factor 1
ATM	Ataxia telangiectasia mutated
ATR	Ataxia telangiectasia and Rad-3 related
BD	Base damage
Cer	Ceramide
CERK	Ceramide kinase
CHO	Cholesterol
C1P	Ceramide-1-phosphate
DDR	DNA damage response
DNAPK	DNA-dependent protein kinase
DSB	Double strand break
Gy	Gray (absorbed dose)
HR	Homologous recombination
IR	Ionizing radiation
MDM2	Mouse double minute 2
NHEJ	Non-homologous end joining
PC	Phosphatidylcholine
PUMA	p53 upregulated modulator of apoptosis
p53AIP1	p53 regulated apoptosis inducing protein 1
ROS	Reactive oxygen species
SK	Sphingosine kinase
SM	Sphingomyelin
SMPDL3b	Sphingomyelin phosphodiesterase acid like-3b
S1P	Sphingosine-1-phosphate
SPP	S1P phosphatase
SSB	Single strand break
TRAIL	TNF-related apoptosis-inducing ligand