NADP is an electron carrier which ferries high energy electrons.

Due to the separate location of the two photosystems in the thylakoid membrane system, mobile electron carriers are required to shuttle electrons between them.

Ubiquinone is an essential electron carrier in prokaryotes.

Plastoquinol is then released into the membrane as a mobile electron carrier.

The mobile electron carriers are, as usual, a lipid-soluble quinone and a water-soluble cytochrome.

Various flavoproteins and iron-sulphur proteins have been identified as potential electron carriers for use during cellular respiration.

The electron is passed along a series of electron carriers.

They also function as electron carriers, but in a very different, intramolecular, solid-state environment.

In some cases the reaction is carried out with a catalytic amount of an electron carrier such as biphenyl or naphthalene.

Mitochondrial electron carrier's ubiquinone and nicotinic acid are also susceptible to pyocyanin.