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Mechanism of Conjugation

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Bacterial conjugation is a mechanism of horizontal gene transfer that enables the exchange of genetic material between bacterial cells through direct contact. This process is facilitated by a donor cell carrying a conjugative plasmid, which encodes genes necessary for pilus formation, DNA replication, and transfer. The conjugative plasmid plays a central role in initiating and executing the transfer of genetic material.The tra region of the conjugative plasmid encodes proteins responsible for...

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Related Experiment Video

Updated: May 9, 2026

Solubilization and Bio-conjugation of Quantum Dots and Bacterial Toxicity Assays by Growth Curve and Plate Count

Solubilization and Bio-conjugation of Quantum Dots and Bacterial Toxicity Assays by Growth Curve and Plate Count

Published on: July 11, 2012

DNA conjugation to nanoparticles.

¹Dankook University, Yongin-si, Gyeonggi-do, South Korea.

Methods in Molecular Biology (Clifton, N.J.)

|August 7, 2013

Summary

This summary is machine-generated.

This study details a protocol for creating nanoparticle-DNA conjugates using gold nanoparticles (AuNPs). It covers essential steps like ligand exchange and DNA attachment for bio-applications.

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Area of Science:

Materials Science
Biotechnology
Nanotechnology

Background:

Nanoparticle-DNA (NP-DNA) conjugates are versatile materials with broad applications in science and engineering.
Gold nanoparticles (AuNPs) are frequently utilized in biological applications due to their unique properties.

Purpose of the Study:

To describe a detailed protocol for conjugating DNA to gold nanoparticles (AuNPs).
To enable the preparation of AuNP-DNA conjugates for various bio-applications.

Main Methods:

The protocol involves ligand exchange on AuNPs to prepare them for DNA conjugation.
DNA strands are attached to the modified AuNPs.
A fluorescence technique is employed to quantify the number of DNA strands per AuNP.

Main Results:

Successful conjugation of DNA to AuNPs was achieved following the described protocol.
The protocol provides a method for surface modification of AuNPs.
The fluorescence assay allows for the characterization of the resulting NP-DNA conjugates.

Conclusions:

The presented protocol offers a reliable method for synthesizing AuNP-DNA conjugates.
This method facilitates the use of AuNP-DNA conjugates in diverse scientific fields.
The protocol includes essential steps for AuNP functionalization and conjugate characterization.