TABLE 5.

Inter- and intra-assay variation in the Pgp3 ELISA

Sample	Interassay variation			Intra-assay variation
	Mean absorbance at 450 nm	SD	Coefficient of variation (%)	Mean absorbance at 450 nm	SD	Coefficient of variation (%)
1	2.647	0.0807	3.1	2.523	0.0645	2.6
2	1.414	0.0555	3.9	1.493	0.0280	1.9
3	0.455	0.0303	6.7	0.447	0.0125	2.8
4	0.097	0.0128	13.2	0.112	0.0051	4.6
5	0.081	0.0075	9.3	0.077	0.0045	5.8