Electron Transport 12电子传递的五类物质: NADH dehydrogenases. Enzymes that catalyse transfer of hydrogen atoms from reduced NAD to flavoproteins Flavoproteins. Flavin mononucleotide( mn) and flavin adenine dinucleotide AD). The flavins are reduced by accepting a hydrogen atom from NAdH and oxidized by losing an electron Electron carriers, cytochromes. Cytochromes are porphyrin containing proteins each of Which can be reduced or oxidized by the loss of a single electron Iron sulfur proteins. These are carriers of electrons with a range of reduction potentiales Quinones. These are lipid-soluble carriers that can diffuse through membranes carrying electrons from iron-sulfur proteins to cytochromes1. Electron Transport ◼ 1.2 电子传递的五类物质： ◼ NADH dehydrogenases.Enzymes that catalyse transfer of hydrogen atoms from reduced NAD to flavoproteins. ◼ Flavoproteins.Flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD). The flavins are reduced by accepting a hydrogen atom from NADH and oxidized by losing an electron. ◼ Electron carriers, cytochromes.Cytochromes are porphyrin containing proteins each of which can be reduced or oxidized by the loss of a single electron. ◼ Iron sulfur proteins.These are carriers of electrons with a range of reduction potentiales. ◼ Quinones.These are lipid-soluble carriers that can diffuse through membranes carrying electrons from iron-sulfur proteins to cytochromes