Type-3 A isoform-specific region. The type-3 A isoform-specific region contained two conserved microdomains. (A) Schematic representation of the type-3 A isoform-specific regions. Positions of the (D/E)(D/E) residues and the A-box are indicated by colored boxes. (B) The alignment and Sequence Logo representation of the full-length of the type-3 A isoform-specific regions. The amino acid residues are represented in the default color scheme of ClustalX. Asterisks indicate identical residues and colons indicate similar residues.