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FISH - Fluorescent In-situ Hybridization02:07

FISH - Fluorescent In-situ Hybridization

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Fluorescence in situ hybridization, or FISH, was developed in the early 1980s and has quickly become one of the most widely used techniques in cytogenetics. Labeled probes are used to bind complementary DNA or RNA sequences on a chromosome or in a region within a cell. Earlier, the probes could only be obtained by cloning or reverse transcription of a DNA template. Currently, the probe oligonucleotides can be synthesized synthetically. Additionally, with the advancement of optical techniques,...
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Reporter Genes02:11

Reporter Genes

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Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
11.4K
Mutagenicity and Carcinogenicity01:25

Mutagenicity and Carcinogenicity

2.0K
Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...
2.0K
Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase01:11

Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase

81
Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...
81
Sulfur Assimilation01:20

Sulfur Assimilation

554
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
554
Spontaneous and Induced Mutations01:30

Spontaneous and Induced Mutations

3.2K
Spontaneous mutations arise infrequently during DNA replication due to errors in the process. A key factor behind these errors is tautomeric shifts in nitrogenous bases, where bases transition from keto to enol forms or amino to imino forms. This shift can alter base-pairing rules, leading to mutations. Additionally, reactive oxygen species (ROS) arising from aerobic metabolism can damage DNA, resulting in depurination (loss of a purine base) or depyrimidination (loss of a pyrimidine base).
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Updated: May 4, 2026

Rapid Identification of Chemical Genetic Interactions in Saccharomyces cerevisiae
12:13

Rapid Identification of Chemical Genetic Interactions in Saccharomyces cerevisiae

Published on: April 5, 2015

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催化基因与芳香性和性硫醇的化.

Changsheng Cao1, Lauren R Fraser, Jennifer A Love

  • 1Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.

Journal of the American Chemical Society
|December 15, 2005
PubMed
概括

这项研究引入了一种新的催化剂,用于基化,有效地产生乙烯基硫化物. 催化剂为分支基乙烯硫化物提供了一条新的途径,克服了现有方法的局限性.

科学领域:

  • 有机金属化学 有机金属化学
  • 催化剂是一种催化剂.
  • 合成有机化学 合成有机化学

背景情况:

  • 基化是合成乙烯硫化物的一个关键反应,乙烯硫化物是重要的合成中间体.
  • 现有的化方法,特别是使用基醇,是有限的,往往缺乏区域选择性.
  • 分支基乙硫化物通过传统的合成途径难以获得.

研究的目的:

  • 开发一种高活性和区域选择性催化剂,用于使用基和基醇进行基化.
  • 探索新型Tp*Rh(PPh3) 2催化剂在硫化乙烯合成中的实用性.
  • 为了研究不同类型的硫醇的基化反应的区域化学结果.

主要方法:

  • 使用Tp*Rh(PPh3) 2作为催化剂,用于基的基化.
  • 在反应中使用了一系列的基和基醇.
  • 分析反应产物以确定区域选择性和产量.

主要成果:

  • Tp*Rh(PPh3) 2表现出高的催化活性,用于基因与基和基二醇的化.
  • 用基硫醇进行化,具有优异的区域选择性,产生分支基乙烯硫化物.
  • 用基醇的基化产生了区域异构体的混合物,其中分支异构体占主导地位,与其他Rh复合物形成鲜明对比.

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Biolistic Transformation of a Fluorescent Tagged Gene into the Opportunistic Fungal Pathogen Cryptococcus neoformans
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结论:

  • Tp*Rh(PPh3) 2是基因水解的有效催化剂,为有价值的乙烯硫化物提供了一条方便的途径.
  • 催化剂可以合成分支基乙硫化物,否则很难获得.
  • 观察到的与基醇的区域选择性为催化化机制提供了新的见解.