TABLE 2

Mean hepatic and intestinal population relative abundance (pmol P450/mg protein) of CYP3A4, CYP2C9, CYP2C19, and CYP2D6 and the mean activity ratio between intestinal microsomes prepared by elution and mucosal scraping

	Liver^a	Intestine^b	Mean Enterocyte Activity Ratio^c
CYP3A4	155	43	8.1
CYP2C9	73	8.4	4.7
CYP2C19	14	1	21
CYP2D6	8	0.5	4.2

↵ a Rowland Yeo et al., 2003.
↵ b Paine et al., 2006.
↵ c Mean ratio of V_max values obtained in microsomes prepared by elution and mucosal scraping method for 11 pathways investigated.