Table 1.

SNPs evaluated

					Minor allele frequency
Gene	Chromosome	SNP	Function	RS No.	observed*	reported†
MDR1	7q21.12a	Ex27 −55T>C	I1145I	1045642	0.49	0.47
MRP1	16p13.11a	Ex28 36G>A	S1219S	2239330	0.28	0.24
MRP2	10q24.2c	Ex10 40G>A	V417I	2273697	0.25	0.23
		Ex28 -16C>T	I1324I	3740066	0.35	0.35
MRP3	17q21.33b	Ex26 -13C>T	H1314H	2277624	0.24	0.17
MRP4	13q32.1a	Ex8 40A>G	R317R	2274406	0.39	0.37
MRP5	3q27.1b	Ex10 -2A>G	Q382Q	7636910	0.35	0.39
BCRP	4q22.1b	Ex5 43C>A	Q141K	2231142	0.12	0.10

Abbreviations: SNP, single-nucleotide polymorphism; RS No., reference SNP identification number.

^*The data observed in current study.

^†The reported minor allele frequency (Caucasian) was from SNP500 cancer database.