Table 2.

Top features according to information gain and information gain ratio (excluding combination features)

Rank	Feature	Information Gain	Feature	Information Gain Ratio
1	Length of best alignment in the upstream intron flank	0.169	Abundance of GA in exon	0.172
2	Upstream intron flank conservation	0.169	Density of single stranded ESEs in exon	0.151
3	Identity of best alignment in the upstream intron flank	0.142	Exon identity	0.128
4	Downstream intron flank conservation	0.138	Average of positive NI scores in exon	0.118
5	Length of best alignment in the downstream intron flank	0.138	Length of best alignment in the upstream intron flank	0.117
6	Exon identity	0.120	Density of AC in exon	0.115
7	Identity of best alignment in the downstream intron flank	0.088	Average of negative NI scores in exon	0.112
8	Exon length	0.080	Density of CT in exon	0.111
9	Matches in 12-mer near 3'ss	0.066	ESE density in exon	0.104
10	Symmetry	0.042	Length of best alignment in the upstream intron flank	0.103