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Exon/intron boundaries of the EXT2 gene. Lowercase letters represent intron sequence; uppercase letters, exon sequence; bold letters, the conserved GT/AG splice junctions. The number of total nucleotides of each exon is indicated in parenthesis. Intron lengths are shown in parenthesis on the right. For exon 14, the length is either 783 or 1276, depending on the use of the alternative polyadenylation sites.
