Gene Transfer Agents (GTAs) are virus-like particles produced by certain bacteria that facilitate the transfer of genetic material between cells. They play a crucial role in horizontal gene transfer, allowing bacteria to acquire new traits, such as antibiotic resistance or metabolic capabilities, from their environment. GTAs are unique because they can package and deliver DNA from one bacterium to another without the need for direct contact. This process enhances genetic diversity within bacterial populations, contributing to their adaptability and evolution in various environments, including extreme conditions.