Zhang and  Chasin: July 6, 2007                   previously published  
    Length PESE/exon (50-250) PESE/nt PESS/exon (50-250) PESS/nt   pese/ 127 nt pess/ 127 nt ave. pese/ ave. pess   pese/ 127 nt pess/ 127 nt ave. pese/ ave. pess
Constitutive Ave 126.7 8.9 0.070 1.7 0.014   8.9 1.8 5.1   9.5 1.7 5.5
50-250 nt SD 45.6 6.5 0.046 2.4 0.019                
n=114,450 Median 121 8 0.063 1 0.008                
                           
Skipped Ave 119.0 7.4 0.062 1.6 0.014   7.9 1.8 4.4   7.3 2.0 3.6
50-250 nt SD 45.1 5.7 0.043 2.3 0.020                
n=11,470 Median 112 6 0.055 1 0.007                
                           
Pseudo exons Ave 142.2 5.3 0.037 6.7 0.047   4.7 6.0 0.8   4.0 6.3 0.6
50-250 nt SD 53.9 4.6 0.030 6.4 0.043                
n=92589 Median 140 4 0.031 5 0.037                
                           
                           
PESE/PESS sets = corrected compared to those used in original publication See Web site and links: http://cubweb.biology.columbia.edu/pesx/  
All datasets are repeat-free (RepeatMasker masked).                    
Pseudo exons have consensus value scores  (Zhang et al., Methods, 2005. Methods 37: 292-305)  of >= 75 and 78 for 3' and 5' splice sites, respectively. 
Constitutive exons include ESTs that must bounded by flanking exons in mRNA sequence).  Even those occuring only once have been included.