Definitions for "Electron carrier"
Keywords:  acceptor, donate, donor, molecule, heme
Any molecule or atom that accepts electrons from donor molecules and transfers them to acceptor molecules. Most are prosthetic groups (e.g., heme, copper, iron-sulfur clusters) associated with membrane-bound proteins.
In a chain of chemical reactions, molecules that accept electrons from an electron donor and pass these to an electron acceptor.
Molecule such as cytochrome c that transfers an electron from a donor molecule to an acceptor molecule.