Table 3.

Summary of ECgene for the mouse genome

	Part A	Part A + B	Part A + B + C
No. of genes	57,238	73,578	194,192
No. of spliced genes (multi-exon genes)	32,715	38,494	43,932
No. of unspliced genes (single-exon genes)	24,523	35,084	150,260
No. of transcripts	138,623	201,259	349,374
No. of spliced transcripts	100,707	149,979	180,480
No. of protein-coding transcripts	127,395	187,367	301,800
No. of protein-coding transcripts with a polyA tail	32,620	59,783	75,301
No. of noncoding transcripts	11,228	13,892	47,574
No. of noncoding transcripts with a polyA tail	1240	1327	1332
No. of alternatively spliced genes	7163	12,522	17,706
Percentage of alternatively spliced genes among multi-exon genes	22%	33%	40%
No. of alternative spliced genes with at least one EST-only splice variants	5115	9655	14,633
Average number of isoforms for spliced genes^a	3.1	3.9	4.1

↵a Average number of isoforms per gene for spliced genes = No. of spliced transcripts/No. of spliced genes

ECgene: Genome-based EST clustering and gene modeling for alternative splicing