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関連する概念動画

Electron Transport Chain Components01:29

Electron Transport Chain Components

603
The electron transport chain (ETC) is a crucial metabolic pathway that facilitates energy conversion in prokaryotic and eukaryotic cells. In eukaryotes, the ETC comprises four membrane-associated protein complexes in the inner mitochondrial membrane. In prokaryotes, the ETC in the plasma membrane can vary in composition, with fewer or different complexes depending on the organism and environmental conditions. These complexes transfer electrons from electron donors, such as NADH and FADH2, to...
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Electron Transport Chains01:28

Electron Transport Chains

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The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
109.6K
Electron Behavior00:54

Electron Behavior

106.2K
Overview
Electrons are negatively charged subatomic particles that are attracted to an orbit around the positively-charged nucleus of an atom. They reside in locations that are associated with energy levels called shells and are further organized into sub-shells and orbitals within each shell.
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the...
106.2K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.7K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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The Z-Scheme of Electron Transport in Photosynthesis01:34

The Z-Scheme of Electron Transport in Photosynthesis

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The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
12.1K
Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

8.6K
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
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関連する実験動画

Updated: Nov 22, 2025

Measuring Trans-Plasma Membrane Electron Transport by C2C12 Myotubes
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Measuring Trans-Plasma Membrane Electron Transport by C2C12 Myotubes

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陽子結合電子伝送ガイドライン,公正

Robin Tyburski1, Tianfei Liu2, Starla D Glover1

  • 1Ångström Laboratory, Department of Chemistry, Uppsala University, Box 523, SE75120 Uppsala, Sweden.

Journal of the American Chemical Society
|January 6, 2021
PubMed
まとめ
この要約は機械生成です。

陽子結合電子伝送 (PCET) の仕組みを理解することは,エネルギー反応を最適化するための鍵です. この展望は,動力学および熱力学データを用いて,連続的および協調的なPCET経路を区別するためのガイドラインを提供します.

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Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors

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F&#246;rster Resonance Energy Transfer Measurements in Living Plant Cells
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Förster Resonance Energy Transfer Measurements in Living Plant Cells

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関連する実験動画

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科学分野:

  • 化学運動と熱力学
  • 触媒と合成化学
  • バイオ有機化学と有機金属化学

背景:

  • 陽子結合電子移転 (PCET) 反応は,自然と人工のエネルギー変換システムにおいて不可欠である.
  • PCET反応は,陽子と電子の移転の相互作用により,機械的な複雑さを示します.
  • 様々なPCETメカニズムを区別することは,反応設計と最適化に不可欠である.

研究 の 目的:

  • 連続的なPCETメカニズムと協調されたPCETメカニズムを区別するための実践的なガイドラインを提供すること.
  • 熱力学とコップリングの強さがPCETメカニズムの優位性にどのように影響するか説明します.
  • 現代の問題とPCET研究の将来の方向性について議論する.

主な方法:

  • 熱力学データの解釈
  • 温度,圧力,同位体依存の運動分析.
  • 新しいPCETゾーン図の開発と適用

主要な成果:

  • 新しいPCETゾーン図は,熱力学と結合強度の変化がメカニズムを切り替えるか排除するかを示しています.
  • 配列型と協調型PCET経路を区別するためのガイドラインが提示されています.
  • 有機反応における非同期協調PCETの役割とその水素原子移転との区別について論じられる.

結論:

  • 効率的なエネルギー変換プロセスの設計には,PCETメカニズム制御を理解することが不可欠です.
  • 熱力学と運動分析は,新しい図と並行して,力学的な解明のための強力なツールを提供します.
  • PCETに関するさらなる研究は,触媒,合成化学,エネルギー科学の進歩に不可欠です.