Sequence alignment of thermophilic ATPases (part 1). The figure shows a sequence alignment of the N-terminal regions of a selection of ATPases from Table 1 generated using Clustal Omega  and visualized in Espript . Numbers indicate residues. The conserved Walker A motifs are labelled below the alignment. Secondary structure elements of STIV2 B204 (PDB: 4KFU) are shown above the aligned sequences.