Table 2.

Normalization Scale for Gene Expression Values

Fold Difference	Normalization
<0.01–0	−4
>0.01–0.05	−3
>0.05–0.50	−2
>0.5–0.99	−1
0	0
>1–1.99	1
2–5	2
5–10	3
10–20	4
20–100	5
100–1,000	6
>1,000	7