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The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
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Related Experiment Video

Updated: Sep 6, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Forty years of combinatorial technology.

Árpád Furka1

  • 1Eötvös Loránd University Budapest Hungary, 1077 Rozsa u. 23-25, Budapest, Hungary.

Drug Discovery Today
|June 27, 2022
PubMed
Summary
This summary is machine-generated.

Combinatorial technology, enhanced by DNA encoding, revolutionizes drug discovery by enabling the screening of billions of compounds. This advanced molecular library screening accelerates the identification of novel pharmaceutical candidates.

Keywords:
Affinity-based selectionCombinatorial chemistryCombinatorial technologyDNA encodingDynamic combinatorial librariesFragment-based drug discoveryOBOC librariesVirtual libraries

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Area of Science:

  • Medicinal Chemistry
  • Molecular Biology
  • Drug Discovery

Background:

  • Combinatorial technology has enabled the synthesis and screening of large molecular libraries for 40 years.
  • It shifted pharmaceutical research from single compounds to vast collections.
  • This technology inspired new approaches like dynamic combinatorial libraries and fragment-based drug discovery.

Purpose of the Study:

  • To highlight the evolution and impact of combinatorial technology in drug discovery.
  • To emphasize the transformative role of DNA encoding in revitalizing combinatorial screening.
  • To showcase the potential of DNA-encoded libraries for screening billions of compounds.

Main Methods:

  • Utilizing DNA encoding for molecular library synthesis and tagging.
  • Employing amplification of DNA oligomers for signal enhancement.
  • Leveraging next-generation sequencing for high-throughput screening of compound libraries.

Main Results:

  • Demonstrated the successful screening of billions of compounds in a single process.
  • Showcased the revitalization of combinatorial technology through DNA encoding.
  • Enabled a paradigm shift towards screening immense molecular collections in pharmaceutical research.

Conclusions:

  • DNA-encoded technology has significantly advanced combinatorial screening capabilities.
  • This approach allows for unprecedented scale in identifying potential drug candidates.
  • Combinatorial technology, especially with DNA encoding, remains a cornerstone of modern drug discovery.