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関連する概念動画

Secondary Active Transport01:32

Secondary Active Transport

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One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme "pump" embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
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Secondary Active Transport01:55

Secondary Active Transport

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One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme “pump” embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
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The Movement of Organelles and Vesicles01:43

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In eukaryotic cells,  cytoskeletal filaments such as actin, microtubules, and intermediate filaments form a mesh-like cytoskeletal network. These filaments serve as tracks for transporting cellular cargo. Specialized motor proteins use the chemical energy stored in adenosine triphosphate (ATP) for this transport. During interphase, microtubules are polarized, with the plus-end towards the cell periphery and the minus-end towards the cell center. Two microtubule-associated motor proteins,...
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Facilitated Transport01:19

Facilitated Transport

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The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In  facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
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Facilitated Transport01:19

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The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In  facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
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Electron Transport Chain Components01:29

Electron Transport Chain Components

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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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関連する実験動画

Updated: Nov 17, 2025

Introduction to Solid Supported Membrane Based Electrophysiology
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Introduction to Solid Supported Membrane Based Electrophysiology

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陽性電荷の静電アンカーを通した単分子電荷輸送

Hongliang Chen1, Vitor Brasiliense1,2, Jingshan Mo3

  • 1Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.

Journal of the American Chemical Society
|February 12, 2021
PubMed
まとめ
この要約は機械生成です。

研究者は,ピリジニウム群を用いた堅固な単分子結合のための新しい静電アンカー戦略を開発した. この方法は分子交差点のバイナリスイッチングを可能にし,新しい酸化還元活性化分子スイッチの道を開きます.

さらに関連する動画

Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution
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関連する実験動画

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Introduction to Solid Supported Membrane Based Electrophysiology
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Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution
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科学分野:

  • 分子電子
  • ナノテクノロジー
  • 超分子化学

背景:

  • 単一分子結合における電荷輸送は,分子線を電極に接続するアンカー群の選択に非常に敏感である.
  • 機能的な分子装置の実現には 堅牢で効率的なアンカリング戦略の開発が不可欠です

研究 の 目的:

  • 固い金分子結合のためのクーロンビック相互作用を利用する 静電アンカーという新しいアンカリング戦略を導入する.
  • この新しいアンカリング方法を用いて,単一分子の交差点におけるリドックススイッチング行動の可能性を調査する.

主な方法:

  • 金の電極とピリジニウム端子グループを使用して静電アンカーを作成する単一分子結合の形成.
  • 金-分子-金結合の電気的特徴は,結合の安定性と電荷輸送特性を評価するためである.
  • 電気的バイアスの下でのディケーション性バイオゲン分子結合のスイッチング行動の調査.

主要な成果:

  • 金とピリジニウムグループのクーロン相互作用に基づく静電アンカーは,堅固な分子結合を形成する.
  • バイナリースイッチングの振る舞いは,ディケーション性バイオゲン分子結合で観察された.
  • 観測されたスイッチングは,電子注入によって誘発された二酸化還元状態と激素の二酸化還元状態の間の変化に起因する.

結論:

  • 静電アンカー戦略は,単一分子結合を形成するための堅固な方法を提供します.
  • 単一分子結合における電子注入誘発による酸化還元スイッチングが実証されている.
  • このアンカリング戦略とスイッチングメカニズムは,新しいリドックス活性化単分子スイッチの開発のための基盤を提供します.