Fig. 3. Multiple amino acid sequence alignment of all plant-type ferredoxins encoded in the genome of C. reinhardtii. The presented linear alignment is restricted to the
conserved C-terminal sequence parts. Cluster binding cysteine residues are indicated in yellow with black background color. A blue background marks sequence parts with
a conservation level of at least 50%. Positions with an orange or red background indicate conserved PetF residues with a moderate or strong influence on PetF dependent
HydA1 activity. Their respective position numbers in PetF are presented above. The C-terminal tyrosine residue of PetF, putatively involved in HydA1 interaction, is shaded
in dark blue. GenBank accession numbers: PETF: XP 001692808.1; FDX2: DQ36047; FDX3: DQ360408; FDX4: DQ360409; FDX5: DQ360410; FDX6: DQ360411.