Compared to the genomic sequence of zebrafish chromosome 15 (NC_007126.5), the RefSeq transcript NM_001013569.1 contains mismatches, as indicated by the grey background and the unclassified transcription discrepancy exception noted in the ‘mouseover’ text (A). Further information about the number and location of mismatches (red vertical lines on the RefSeq transcript) is provided by the RefSeq Alignments track (B), both graphically and by additional ‘mouseover’ text (C).