Extended Data Fig. 6: Close-up view on the interaction between TSP9 and cytb₆f.

Color code: TSP9 - cyan; cyt b -, green; subunit IV – light teal; PetG - grey. E50^TSP9 forms a salt bridge with R125^sIV which also forms a bridge with L215^b6. The formation / braking of the latter bridge has been shown to have important regulatory consequences, as described in^7,40.