Intron positions are rarely lost at the 5' end



Examples in which the intron position at the 5' end (i1) of the protein-coding gene sequence is not conserved exist, but they remain exceptional .

CLUSTALX multiple alignment of S. cerevisiae paralogous genes







CLUSTALX multiple alignment of orthologous genes






Last modified: Tue Feb 10 11:11:50 CET 2004