Table 1.

Experimental design for the AZT and 3TC effects on mouse-liver gene expression.

Genotype	(+/-)			(+/+)
Treatment	Vehicle	AZT 240 mg/kg/d	AZT+3TC 160+100 mg/kg/d	Vehicle	AZT+3TC 160+100 mg/kg/d
Batch 1	A1	B1	C1	D1	E1
Batch 2	A2	B2	C2	D2	E2
Batch 3	A3	B3	C3	D3	E3

Fifteen samples are collected and assayed for gene expression using the experimental design