Table 2.

The percent contributions of individual features to the principal components in the within-gene analysis.

Exon features	Comp 1	Comp 2	Comp 3	Comp 4	Comp 5	Comp 6	Comp 7	Comp 8	Comp 9	Comp 10	Comp 11
ASE/CSE exon type	0.070	0.421	0.002	0.001	0.003	0.000	0.001	0.000	0.000	0.000	0.501
Weighted exon frequency (WEF)	0.070	0.418	0.002	0.001	0.007	0.002	0.001	0.000	0.000	0.000	0.498
Average exonic expression level	0.042	0.018	0.454	0.000	0.004	0.006	0.000	0.000	0.462	0.013	0.000
5′ intron length	0.014	0.000	0.017	0.088	0.330	0.161	0.362	0.025	0.002	0.001	0.000
3′ intron length	0.001	0.000	0.003	0.422	0.161	0.001	0.389	0.010	0.012	0.001	0.000
Exon length	0.092	0.028	0.330	0.005	0.001	0.000	0.063	0.002	0.434	0.046	0.000
G+C content	0.005	0.001	0.017	0.428	0.252	0.089	0.133	0.017	0.038	0.020	0.000
Exon duplicability	0.000	0.013	0.001	0.022	0.216	0.708	0.035	0.000	0.002	0.000	0.001
% solvent-accessible amino acid residues	0.208a	0.031	0.087	0.030	0.024	0.029	0.000	0.270	0.032	0.289	0.000
% intrinsically disordered regions	0.298	0.042	0.053	0.002	0.001	0.002	0.002	0.022	0.012	0.566	0.000
% Pfam domain	0.198	0.027	0.035	0.000	0.001	0.001	0.013	0.655	0.006	0.063	0.000

Notes:

^aThe numbers larger than 0.2 are color-shaded. The color code in the table is the same as that used in Figure 1. eleven principal components in the within-gene analysis are given in Supplementary Figure S2.