Contact: Mary Beckman
DOE/Pacific Northwest National Laboratory
Caption: Numbered heme groups (in color) lie within MtrF protein's framework (in gray) and shuttle electrons from one end of the protein to the other.
Credit: Cortland Johnson (PNNL) and Julian Breuer
Usage Restrictions: Please credit Johnson/Breuer/PNNL
Related news release: Hugging hemes help electrons hop