Figure 6.

A, structure of FtsZ from B. subtilis (Protein Data Bank code 2VAM). The H7 helix is shown in orange, the T7 loop is green, and the H8 helix is blue. Thr-216 and Ser-219 are shown as sticks. B, sequence alignment of FtsZ with a focus on the conserved region of H7 helix, T7 loop, and H8 helix from bacteria, cyanobacteria, and chloroplasts. Two amino acids in helix H8 are mostly conserved as Thr and Ser in bacteria (highlighted in red) and mostly Ala in cyanobacteria (highlighted in blue).