Electron Transport Chain Research Paper
Farayha Razzaq
ELECTRON TRANSPORT CHAIN
It is a series of biochemical redox reactions that influences the transfer of electrons through carriers .It uses the reduction of molecular oxygen through the movement of protons across the membrane of mitochondria and generates ATP.
Main features of ETC
• Four protein complexes are involved in the electron transport chain for the movement of electrons from NADH and FADH2 to molecular oxygen.
• Hydrogen ion gradient is produced by protein complex-I by the pumping of four hydrogen ions across the membrane.
• FADH2 is received by complex-II and gives electron to electron transport chain.
• Electrons from complex-I and complex-II is received by Ubiquinone (Q) .
• Electrons from complex-III are
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FMN is derived from vitamin B2 is considered as one of the many prosthetic groups or co-factors in electron transport chain. It is also known as riboflavin. A non protein molecule which is essential for the functioning of protein is called prosthetic group. It can be organic or can be inorganic. The protein function is facilitated by a non peptide molecule which is attached with a protein. The prosthetic groups of enzymes are called co-enzymes. The name of enzyme in this complex is NADH dehydrogenase which is very huge protein containing 45 amino acid chains. Four hydrogen ions are pumped from the matrix into the inter membrane space by this complex. In this way hydrogen ion gradient is maintained between the two compartments which are separated by inner mitochondrial …show more content…
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