相关实验视频
Updated: Jul 16, 2026

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In Vitro Analysis of PDZ-dependent CFTR Macromolecular Signaling Complexes
Published on: August 13, 2012
洞察了多态选择背后的分子机制.
Caroline Desgranges1, Jerome Delhommelle
1Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29201, USA.
Journal of the American Chemical Society
|November 23, 2006
概括
分子模拟显示,结晶动力学,而不仅仅是稳定性,决定了合体悬浮中的多态选择. 复杂的生长机制涉及到转移到稳定的结构的变态稳定阶段.
科学领域:
- 体科学是一种体科学.
- 材料科学是一种材料科学.
- 结晶化 结晶化 结晶化
背景情况:
- 在结晶过程中,多态选择至关重要.
- 电荷稳定型体悬浮为研究结晶提供了一个模型系统.
- 了解热力学和动力学之间的相互作用是必不可少的.
研究的目的:
- 用分子模拟来研究合结晶过程中的多态选择.
- 探索结晶条件对多态态稳定的影响.
- 阐明控制晶体生长的动力机制.
主要方法:
- 利用分子模拟来建模电荷稳定型合体悬浮液的结晶.
- 操纵结晶条件以改变多态稳定性.
- 在分子水平上分析核和生长机制.
主要成果:
- 通过修改结晶条件,证明了反转多态稳定的能力.
- 观察到动力学对核形成和生长都有显著影响.
- 确定了一种复杂的生长机制,涉及转基因稳定多态体的交叉核化,随后转化为稳定形式.
结论:
- 动力学在多态选择中发挥着主导作用,即使热力学稳定性被逆转.
- 晶体生长并不总是直接的,但可以涉及中间的转移稳定阶段.
- 分子模拟为复杂的结晶路径提供了关键的见解.
相关概念视频
Positive Regulator Molecules
To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
Regulation of Expression Occurs at Multiple Steps
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Positive Regulator Molecules
Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.
Radical Chain-Growth Polymerization: Mechanism
The radical chain-growth polymerization mechanism consists of three steps: initiation, propagation, and termination of polymerization. The polymerization initiates when a free radical generated from the radical initiator adds to the unsaturated bond in the monomer. The unpaired electron of the free radical and one π electron in the unsaturated bond creates a σ bond between the free radical and the monomer. As a result, the other π electron in the unsaturated bond converts this species into the...
Anionic Chain-Growth Polymerization: Mechanism
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael acceptor.
Regulation of Expression Occurs at Multiple Steps
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...

