Skip to main content
Back

Photophosphorylation 3 definitions

Control buttons has been changed to "navigation" mode.
1/15
  • Photosystem II
    A protein complex with P680 chlorophyll that absorbs light, splits water, and initiates non-cyclic electron flow in photosynthesis.
  • P680
    A chlorophyll molecule in the reaction center of a protein complex, absorbing light most efficiently at 680 nm.
  • Water Splitting
    A process generating electrons, protons, and oxygen, replenishing lost electrons in a light-absorbing protein complex.
  • Cytochrome b6f Complex
    A membrane protein containing hemes and iron-sulfur centers, acting as a proton pump and electron transporter in photosynthesis.
  • Plastoquinone
    An electron carrier that shuttles electrons from a light-absorbing protein complex to a proton-pumping membrane complex.
  • Plastocyanin
    A copper-containing protein that transfers electrons from a membrane complex to a second light-absorbing protein complex.
  • Photosystem I
    A protein complex with P700 chlorophyll, absorbing light at 700 nm and transferring electrons to ferredoxin.
  • P700
    A chlorophyll molecule in a protein complex, absorbing light most efficiently at 700 nm.
  • Ferredoxin
    An iron-sulfur protein that receives electrons from a light-absorbing complex and directs them toward NADP+ reduction or cyclic flow.
  • NADPH
    A reduced coenzyme formed by electron transfer, serving as a key product for anabolic reactions in photosynthesis.
  • ATP Synthase
    An enzyme powered by a proton gradient across a membrane, synthesizing ATP during light-driven phosphorylation.
  • Proton Gradient
    A difference in proton concentration across a membrane, generating a force that drives ATP production.
  • Protonmotive Force
    The energy stored by a proton gradient, used to power ATP synthesis in light-driven reactions.
  • Cyclic Electron Flow
    A pathway where electrons cycle from a light-absorbing complex through carriers, producing only ATP.
  • Non-cyclic Electron Flow
    A pathway where electrons move linearly from water to NADP+, producing both ATP and NADPH.