Association of Polymorphisms in X-Ray Repair Cross Complementing 1 Gene and Risk of Esophageal Squamous Cell Carcinoma in a Chinese Population

Table 1

Primer sequences and restriction endonucleases of three SNPs in XRCC1 gene.

SNPs	Location	Position	Primers	Enzymes	Digested fragments
codon 194	exon 6	C26304T	F: GCCAGGGCCCCTCCTTCAA; R: TACCCTCAGACCCACGAGT	PvuII	CC (485); CT (485, 396, 89); TT (396, 89)
codon 399	exon 10	G28152A	F: TTGTGCTTTCTCTGTGTCCA; R: TCCTCCAGCCTTTTCTGATA	MspI	GG (374, 241); GA (615, 374, 241); AA (615)
−77T>C	5′UTR	T-77C	F: GGTTCTGGAAGCCACTCA; R: GGGCTGAGGGCCTAAAC	BsrB I	TT (167, 67); TC (234, 167, 67); CC (234)