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関連する概念動画

Membrane Fluidity01:26

Membrane Fluidity

Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...
Membrane Fluidity01:23

Membrane Fluidity

Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.Fatty acids tails of phospholipids can be either saturated or...
Membrane Domains01:18

Membrane Domains

The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the anterior...
Fluid Mosaic Model01:19

Fluid Mosaic Model

Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich with the analogy of...
Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with cytoskeletal...
SNAREs and Membrane Fusion01:43

SNAREs and Membrane Fusion

Once a transport vesicle has recognized its target organelle, the vesicular membrane needs to fuse with the target membrane to unload the cargo. Transmembrane proteins called SNAREs present on organelle membranes and their vesicles, mediate vesicle fusion.
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...

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関連する実験動画

Updated: Jul 2, 2026

Lipid-Protein Membrane Structure-Function Characterization using Droplet Interface Bilayers
10:27

Lipid-Protein Membrane Structure-Function Characterization using Droplet Interface Bilayers

Published on: June 12, 2026

膜区間の完全な湿潤から部分的な湿潤への移行

Yanhong Li1, Reinhard Lipowsky, Rumiana Dimova

  • 1Theory & Bio-Systems, Max Planck Institute of Colloids and Interfaces, Science Park Golm, 14424 Potsdam, Germany.

Journal of the American Chemical Society
|August 21, 2008
PubMed
まとめ
この要約は機械生成です。

研究者らは,メソスコピック膜区画で初めて湿潤の移行を観察した. 巨大膀におけるポリマー濃度の上昇により,PEGが豊富なフェーズが完全な膜湿潤から部分的な膜湿潤に変化した.

さらに関連する動画

Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film
08:23

Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film

Published on: July 10, 2016

Spontaneous Formation and Rearrangement of Artificial Lipid Nanotube Networks as a Bottom-Up Model for Endoplasmic Reticulum
07:49

Spontaneous Formation and Rearrangement of Artificial Lipid Nanotube Networks as a Bottom-Up Model for Endoplasmic Reticulum

Published on: January 22, 2019

関連する実験動画

Last Updated: Jul 2, 2026

Lipid-Protein Membrane Structure-Function Characterization using Droplet Interface Bilayers
10:27

Lipid-Protein Membrane Structure-Function Characterization using Droplet Interface Bilayers

Published on: June 12, 2026

Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film
08:23

Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film

Published on: July 10, 2016

Spontaneous Formation and Rearrangement of Artificial Lipid Nanotube Networks as a Bottom-Up Model for Endoplasmic Reticulum
07:49

Spontaneous Formation and Rearrangement of Artificial Lipid Nanotube Networks as a Bottom-Up Model for Endoplasmic Reticulum

Published on: January 22, 2019

科学分野:

  • コロイドと表面科学 コロイドと表面科学
  • ソフトマター物理学 ソフトマター物理学
  • バイオフィジックス 生物物理学

背景:

  • 湿潤と露出は一般的な現象ですが,湿潤の移行の実験的観測はまれです.
  • メソスコピックシステムは,インターフェイス現象を研究するためのユニークなプラットフォームを提供します.

研究 の 目的:

  • メソスコーピック膜区間の内部の濡れる移行の最初の観測を報告する.
  • ポリマー濃度の影響が巨大な膀の濡れる行動に及ぼす影響を調査する.

主な方法:

  • 2相の水性ポリマー溶液 (ポリエチレングリコールとデクストラン) を巨大な膀の中に封じ込みます.
  • ポリマー濃度の操作により,相行動の変化を誘発する.
  • 顕微鏡を用いて,膜界面での湿潤と脱湿のダイナミクスを観察する.

主要な成果:

  • メソスコピック膜区間では,明確な湿潤の移行が観察されました.
  • ポリエチレングリコールに富んだフェーズは,膜の完全な濡れから部分的な濡れへと移行した.
  • この移行は,膀内のポリマー濃度の増加によって誘発された.

結論:

  • メソスコピック膜区間は,調節可能な濡れ切りの移行を示し得ます.
  • ポリマーの濃度は,そのようなシステムにおける湿り行為を制御する重要な要因です.
  • この研究は,湿潤現象を研究するための新しい実験モデルを提供します.