| Plastoquinone | |
|---|---|
 |
|
| Identifiers | |
| CAS number | 4299-57-4 |
| PubChem | |
| Properties | |
| Molecular formula | C53H80O2 |
| Molar mass | 749,20 g·mol−1 |
| Related compounds | |
| Related compounds | 1,4-benzoquinone quinone Coenzyme Q10 |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references |
|
Plastoquinone, (often abbreviated PQ), is a quinone molecule involved in the electron transport chain in the light-dependent reactions of photosynthesis. Plastoquinone is reduced (accepts two protons (H+) from the stromal matrix of the chloroplast, coupled to two electrons (e-) from photosystem II), forming plastoquinol. It transports the protons to the lumen of thylakoid discs, while the electrons continue through the electron transport chain into the cytochrome b6f protein complex.
