Plastoquinone Q A

Plastoquinones Q A and Q B are two molecules that participate in the electron transfer system betweeen photosystem II (PSII) and photosystem I. The sequence of carriers is as follows: Pheophytin -> Q A -> Q B -> Q H. Plastoquinone Q A and Q B are associated with PSII proteins. Electron transfer involving plastoquinones is shown here. Reduction of a plastoquinone creates a plastoquinol.

See also: Plastoquinones, Photosystem II, Photosystem I, Plastoquinone Q H, Pheophytin, Plastoquinone Q B