AA	Ascorbic acid
AF4	Apple peel flavonoid fraction 4
AOX1	Antioxidant formulation
ATM	Ataxia telangiectasia mutated
ATR	ATM-Rad3-related
BC	beta-Carotene
BEAS-2B	Normal human bronchial epithelial cells
Chk	Checkpoint kinases
DDR	DNA damage response
DMSO	Dimethyl sulfoxide
DSBs	DNA double-strand breaks
FA	Folic acid
LA	alpha-Lipoic acid
MTX	Methotrexate
NAC	N-acetyl cysteine
NNK	4-[(methyl)nitrosamino]-1-(3-pyridyl)-1-butanone
NNKOAc	4-[(acetoxymethyl)nitrosamino]-1-(3-pyridyl)-1-butanone
Q	Quercetin
Q3G	Quercetin 3-O-d-glucoside
ROS	Reactive oxygen species