Association between Genetic Polymorphisms of DNA Repair Genes and Chromosomal Damage for 1,3-Butadiene-Exposed Workers in a Matched Study in China

Table 3

Distribution of genotypes and allele frequencies among 1,3-butadiene- (BD-) exposed workers.

SNPs	Genotypes		Rate%	Frequency
XRCC1 -77	TT	30	66.7	T: 0.83
	CT	15	33.3	C: 0.27
	CC	0
XRCC1 194	CC	37	82.2	C: 0.91
	CT	8	17.8	T: 0.09
	TT	0
XRCC1 280	GG	36	80.0	G: 0.88
	GA	7	15.6	A: 0.12
	AA	2	4.4
XRCC1 399	GG	27	60.0	G: 0.76
	GA	14	31.1	A: 0.24
	AA	4	8.9
ADPRT 762	TT	15	33.3	T: 0.56
	CT	20	44.4	C: 0.44
	CC	10	22.3
MGMT 84	CC	32	71.1	C: 0.84
	CT	12	26.7	T: 0.16
	TT	1	2.2
APE1 148	TT	11	24.4	T: 0.54
	GT	27	60.0	G: 0.46
	GG	7	15.6