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(A) Tetrameric organization of FtPPK2 within the asymmetric unit. (B) FtPPK2 monomer A, labelling the α-helices (α-1–12) and strands of β-sheet (β-1–6). The lid-loop motif, including helices α-8 and α-9, is coloured red, the Walker A and B motifs are coloured blue and purple respectively. (C) Topology diagram colour coded as in (B).
