FIGURE 4.

Phormidium cyt f mutations. Data were taken from Tables 4 and 5. Class I (>80% WT; dark blue); class II (59–77% WT; cyan); class III (50–59% WT; green); class IV (44–48% WT; yellow); class V (<40% WT; red); and heme (black). (A) Plus Zn²⁺ and (B) minus Zn²⁺.