Table 1.

Frequencies of BCRP c.421CC, c.421CA, and c.421AA, and OATP1B1 c.521TT, c.521TC, and c.521CC in Caucasian, Chinese, Japanese, and Korean populations

Ethnicity	BCRP			Sample size	References
	c.421CC	c.421CA	c.421AA
Caucasian	0.82	0.17	0.01	982	[7, 33, 34]
Chinese	0.43	0.45	0.12	115	[33, 35]
Japanese	0.50	0.41	0.09	244	[36, 37]
Korean	0.52	0.40	0.08	250	[31]

Ethnicity	OATP1B1			Sample size	References
	c.521TT	c.521TC	521CC
Caucasian	0.64	0.32	0.04	468	[38]
Chinese	0.85	0.14	<0.01	128	[13, 38–41]
Japanese	0.69	0.30	0.01	120	[42]
Korean	0.78	0.21	0.01	200	[43]

BCRP breast cancer resistance protein, OATP organic anion transporting polypeptide