Table 2. Principle component analysis results of twenty-five selenoproteins and five apoptosis-related genes in the chicken embryonic neurocytes.

Component	Initial eigenvalues			Extraction sums of squared
	Total	% of variance	Cumulative %	Total	% of variance	Cumulative %
1	28.063	93.543	93.543	28.063	93.543	93.543
2	0.484	1.612	95.156	0.484	1.612	95.156
3	0.332	1.107	96.263
4	0.199	0.663	96.926
5	0.157	0.525	97.450
6	0.142	0.474	97.924
7	0.101	0.335	98.259
8	0.090	0.301	98.560
9	0.072	0.239	98.800
10	0.056	0.187	98.987
11	0.051	0.170	99.156
12	0.046	0.153	99.309
13	0.037	0.124	99.433
14	0.033	0.110	99.543
15	0.028	0.094	99.638
16	0.024	0.081	99.718
17	0.020	0.068	99.786
18	0.016	0.052	99.839
19	0.013	0.044	99.883
20	0.012	0.039	99.921
21	0.008	0.027	99.949
22	0.006	0.020	99.968
23	0.003	0.010	99.978
24	0.003	0.010	99.988
25	0.002	0.006	99.994
26	0.001	0.003	99.997
27	0.000	0.002	99.999
28	0.000	0.001	99.999
29	0.000	0.000	100.000
30	2.849E-5	9.498E-5	100.000