Question

Why is P680 called so?

Answer 1

P680:

1. The reaction-center chlorophyll, or photosystem II primary donor, is a molecular dimer linked with Photosystem II in plants, algae, and cyanobacteria, and is essential for oxygenic photosynthesis.
2. PS II is a multi-subunit membrane-protein complex participating in oxygenic photosynthesis.
3. When absorbing a photon, P680 is a collection of pigments that are excitonically connected or function as if they are a single molecule.
4. It got its name from the wavelength (in nanometers) at which it captures the most light.
5. It is the electromagnetic spectrum at 680 nm in this case.