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Table 2 Properties of ENACE CDS exons (including 6 ENACE identifications).

From: Identification and evolutionary analysis of novel exons and alternative splicing events using cross-species EST-to-genome comparisons in human, mouse and rat

Cassette-on exons  
No. of exons identified 692
Average length (bp) 86
Median length (bp) 63
Average number of supporting ESTs 1.3
Average sequence identity with the counterpart (%) 89
Retained introns  
No. of exons identified 66
Average length (bp) 766
Average length of retained intron (bp) 115
Average number of supporting ESTs 1.1
Average sequence identity with the counterpart (%) 86
No. of initial exons1 17
No. of terminal exons2 19
No. of single-exon transcripts3 6
  1. The retained introns connect 1 the first and the second (or 2 the last and the second last) coding exons of the original transcripts. 3 The retained introns connect the exons of originally two-exon transcripts to make single-exon transcripts.