Table 2. Proteins that were differentially expressed by at least 4.5 times between A549 and NCI-H358 cells by 2D-DIGE.

Spot No.	Ratio of spot density(A549/NCI-H358)	p
1	11.06	0.00068
2	−19.51	0.000048
3	−15.07	0.000083
4	−9.57	0.000069
5	−9.17	0.0036
6	−7.46	0.00029
7	−5.22	0.0014
8	−4.59	0.0042

Ratio, ratio of the relative protein abundance between the A549 and NCI-H358 cell lines. Spot numbers correspond to the 2D-DIGE gels in Figure 2, Figure 3, and Table 3. 2D-DIGE, two-dimensional difference gel electrophoresis.