Sandbox 143: Difference between revisions
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The copper atom bound to the plastocyanin is in the shape Cu<sup>2+</sup>. This shape of plastocyanin is reduced by the cytochrome b<sub>6</sub>f according to the following reaction : | The copper atom bound to the plastocyanin is in the shape Cu<sup>2+</sup>. This shape of plastocyanin is reduced by the cytochrome b<sub>6</sub>f according to the following reaction : | ||
Cu<sup>2+</sup>Pc + e<sup>-</sup> → Cu<sup>+</sup>Pc | :Cu<sup>2+</sup>Pc + e<sup>-</sup> → Cu<sup>+</sup>Pc | ||
The electron is given up by the cytochrome b<sub>6</sub>f and transforms plastocyanin in shape Cu<sup>2+</sup> into plastocyanin in shape Cu<sup>+</sup>. | The electron is given up by the cytochrome b<sub>6</sub>f and transforms plastocyanin in shape Cu<sup>2+</sup> into plastocyanin in shape Cu<sup>+</sup>. | ||
Then this plastocyanin diffuses through the lumen of thylakoid (remember its localisation in intern membrane of the thylakoid) until the recognition/binding occurs with the photosystem I. | Then this plastocyanin diffuses through the lumen of thylakoid (remember its localisation in intern membrane of the thylakoid) until the recognition/binding occurs with the photosystem I. | ||
Photosystem I (P700)oxidizes Cu<sup>+</sup>Pc according to the following reaction : | Photosystem I (P700)oxidizes Cu<sup>+</sup>Pc according to the following reaction : | ||
Cu<sup>+</sup>Pc → Cu<sup>2+</sup>Pc + e<sup>-</sup> | :Cu<sup>+</sup>Pc → Cu<sup>2+</sup>Pc + e<sup>-</sup> | ||
P700 become P700<sup>+</sup>. | P700 become P700<sup>+</sup>. | ||
