Schematic alignment of amino acid TR units derived from MUC2 and MUC6 genomic sequences. Aligned DNA sequences from MUC2 PTS-TR2 (a) and MUC6 PTS-TR (b) from different sequencing projects. Each box represents 1 TR unit (as outlined in Figs 3 and 4). Highlighted boxes indicate unique repeats. TR units homologous to RP13-870H17 are marked in grey and to CH17-246P12 are marked in orange. White boxes indicate non-identical TR units. Yellow boxes show identical repeats. *Indicate incomplete sequence (inserted/deleted bases). The KOREF MUC2 sequence was incomplete and misassembled and was therefore not used.