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相关概念视频

Relative Strengths of Conjugate Acid-Base Pairs02:29

Relative Strengths of Conjugate Acid-Base Pairs

45.4K
Brønsted-Lowry acid-base chemistry is the transfer of protons; thus, logic suggests a relation between the relative strengths of conjugate acid-base pairs. The strength of an acid or base is quantified in its ionization constant, Ka or Kb, which represents the extent of the acid or base ionization reaction. For the conjugate acid-base pair HA / A−, the ionization equilibrium equations and ionization constant expressions are
45.4K
Acid/Base Strengths and Dissociation Constants03:02

Acid/Base Strengths and Dissociation Constants

60.3K
The relative strength of an acid or base is the extent to which it ionizes when dissolved in water. If the ionization reaction is essentially complete, the acid or base is termed strong; if relatively little ionization occurs, the acid or base is weak. There are many more weak acids and bases than strong ones. The most common strong acids and bases are listed below:
60.3K
The Equilibrium Binding Constant and Binding Strength02:18

The Equilibrium Binding Constant and Binding Strength

12.8K
The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
12.8K
Complexation Equilibria: Overview01:23

Complexation Equilibria: Overview

642
Complexation reactions take place when dative or coordinate covalent bonds form between metal ions and ligands. The compounds formed in these reactions are called coordination compounds. The number of bonds formed between the metal ion and the ligands is called its coordination number. Generally, most metal ions in an aqueous solution are solvated by water molecules and thus exist as aqua complexes.
The equilibrium constant of the complexation reaction is represented as the formation constant...
642
Acid and Bases: Ka, pKa, and Relative Strengths02:35

Acid and Bases: Ka, pKa, and Relative Strengths

26.3K
This lesson delves into a critical aspect of the relative strengths of acids and bases. The strength of an acid is evaluated by the acid dissociation into its conjugate base and a hydronium ion in water. The complete dissociation of a strong acid is confirmed with a very high concentration of hydronium ions. As a result, an incomplete dissociation process affirms a weak acid. Therefore, the equilibrium is in the forward direction for strong acids and backward for weak acids in these reactions.
26.3K
EDTA: Conditional Formation Constant01:09

EDTA: Conditional Formation Constant

775
Each EDTA molecule has six binding sites: four carboxyl groups and two amino groups. The fully protonated form of EDTA is represented as H6Y2+. However, it can exist in different forms, H5Y+, H4Y, H3Y−, H2Y2−, and HY3−, depending on the pH of the solution. In very basic solutions with pH > 10.17, the fully deprotonated form, Y4−, is the predominant species that readily complexes with metal ions in a 1:1 ratio.
For the equilibrium reaction of the metal with the...
775

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相关实验视频

Updated: Jun 12, 2025

Titration ELISA as a Method to Determine the Dissociation Constant of Receptor Ligand Interaction
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Titration ELISA as a Method to Determine the Dissociation Constant of Receptor Ligand Interaction

Published on: February 15, 2018

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简单的方法来确定解离常数,Kd.

Donghun Lee1, Juwon Kim1, Gwangrog Lee1

  • 1Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea.

Molecules and cells
|September 18, 2024
PubMed
概括

我们介绍了一种新的单分子光方法来确定解离常数 (Kd),为蛋白质基质结合亲和关系提供了精确的见解. 这种技术增强了对药物开发至关重要的分子相互作用的理解.

科学领域:

  • 生物化学 生物化学
  • 药理学 药理学是指药理学的学科.
  • 分子生物学分子生物学

背景情况:

  • 分离常数 (Kd) 对于量化生物系统中的结合亲缘关系至关重要.
  • 了解这些亲和关系对于药物开发和生物机制阐明至关重要.

研究的目的:

  • 引入单分子光共振能量转移 (smFRET) 方法来确定Kd.
  • 为了比较smFRET方法与传统的电泳运动转移试验 (EMSA) 进行Kd确定.
  • 提供对蛋白质和基质之间的热力学相互作用的见解.

主要方法:

  • 使用单分子光共振能量转移 (smFRET) 与光标记.
  • 采用电泳运动移动性转换试验 (EMSA) 作为常规方法.
  • 分析基于光信号和蛋白质-DNA相互作用的结合和解离动力学.

主要成果:

  • smFRET方法准确地测量了结合和解离动力学.
  • 证明了smFRET在表征热力学相互作用方面的能力.
  • 突出了蛋白质-DNA相互作用的内在性质.

结论:

关键词:
解离常数是解离的常数.电泳运动移动转移试验试验.酵素酶是一种酶.运动学 运动学蛋白质蛋白质是一种蛋白质.单分子光共振传输能量转移.

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Determination of Protein-ligand Interactions Using Differential Scanning Fluorimetry
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Determination of Protein-ligand Interactions Using Differential Scanning Fluorimetry

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Determining Binding Affinity KD of Radiolabeled Antibodies to Immobilized Antigens
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Determining Binding Affinity KD of Radiolabeled Antibodies to Immobilized Antigens

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相关实验视频

Last Updated: Jun 12, 2025

Titration ELISA as a Method to Determine the Dissociation Constant of Receptor Ligand Interaction
12:38

Titration ELISA as a Method to Determine the Dissociation Constant of Receptor Ligand Interaction

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Determination of Protein-ligand Interactions Using Differential Scanning Fluorimetry
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Determination of Protein-ligand Interactions Using Differential Scanning Fluorimetry

Published on: September 13, 2014

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Determining Binding Affinity KD of Radiolabeled Antibodies to Immobilized Antigens
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Determining Binding Affinity KD of Radiolabeled Antibodies to Immobilized Antigens

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  • smFRET方法代表了确定Kd的重大进步.
  • 这种技术提供了更高的精度和对分子相互作用的洞察力.
  • 提高分子生物学和药理学研究的能力.