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The Evidence for Evolution

The Evidence for Evolution

Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.

Convergent Evolution

Convergent Evolution

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Eukaryotic Evolution

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The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...

Synteny and Evolution

Synteny and Evolution

John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
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Organic Compounds

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Related Experiment Video

Updated: Feb 3, 2026

Molecular Evolution of the Tre Recombinase

Molecular Evolution of the Tre Recombinase

Published on: May 29, 2008

Evolution of commercially available compounds for HTS.

Dmitriy M Volochnyuk¹, Sergey V Ryabukhin², Yurii S Moroz³

¹Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Murmanska Street 5, Kyiv 02660, Ukraine.

Drug Discovery Today

|November 7, 2018

Summary

Drug discovery now has over 16 million screening compounds from suppliers. This review analyzes the chemical space, quality, and feasibility of vendor-based libraries for efficient drug development.

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Area of Science:

Medicinal Chemistry
Drug Discovery
Chemical Biology

Background:

The pharmaceutical industry relies heavily on screening compounds for drug discovery.
An extensive market of over 16 million compounds is now available from commercial suppliers.
Evaluating these commercial compound libraries is crucial for efficient research and development.

Purpose of the Study:

To review the chemical space of suppliers' compound libraries (SCL).
To assess the physicochemical properties, novelty, diversity, and quality of SCL.
To examine the feasibility of creating high-quality, vendor-based libraries with reduced management overhead.

Main Methods:

Analysis of compound physicochemical properties.
Assessment of novelty and diversity within SCL.
Comparison of SCL against the ChEMBL database.
Evaluation of vendor responses to drug discovery needs.

Main Results:

Suppliers offer a vast and diverse range of screening compounds.
The quality and novelty of SCL vary, requiring careful selection.
Vendor-based libraries can be compiled efficiently, reducing costs and complexity.
Commercial libraries show significant overlap but also unique chemical matter compared to ChEMBL.

Conclusions:

Supplier compound libraries represent a valuable resource for drug discovery.
Strategic selection and management of SCL are key to maximizing their utility.
The commercial compound supply industry is adapting to the evolving demands of modern drug discovery.