Fig. 4
A Alignment plot comparing occludin and four occludin-linked KRTAP proteins of Homo sapiens. Upper portion—full sequence. Lower portion—a higher matched section on an expanded scale. (The colour coding here is the “Column Quality score–Protein”, which assigns scores to residues based on how well a particular residue agrees with the others in the column (grey high to red low). The KRTAPs are, from top downwards: 19–3, 19–8, 20–1, and 19–1. The Expect values of the four KRTAPs against occludin are 2 × 10–05, 3 × 10–05, 4 × 10-05, 7 × 10-05, and 5 × 10-04, respectively. The occludin itself lies at the top of the set (Q16625). B Alignment plot comparing the sequence of the KRTAP21-1-like protein of the bank vole Myodes glareolus (upper row) with the GY repeating sequence that is the KRTAP6-2-like protein of the collared flycatcher (lower row)