240k157

240k157 is a specific strain of the bacterium Escherichia coli (E. coli). It is a member of the K12 subgroup, which is one of the most widely studied strains of E. coli due to its well-characterized genetic makeup. The strain is often used in laboratory research for various purposes, including genetic studies, biochemical research, and as a model organism for understanding bacterial physiology and metabolism.

The 240k157 strain is notable for its genetic stability and ease of manipulation. It carries a lambda prophage, which is a viral DNA that can integrate into the bacterial chromosome and be induced to excise and replicate as a lytic phage. This feature makes it useful for genetic engineering techniques such as lambda transduction, where the lambda phage can carry foreign DNA into the bacterium.

In addition to its genetic properties, 240k157 is also used in studies of bacterial pathogenesis and virulence. It can be engineered to express specific virulence factors, making it a valuable tool for investigating how bacteria cause disease.

Overall, 240k157 is a versatile and widely used strain of E. coli that contributes significantly to our understanding of bacterial biology and genetics. Its genetic stability, ease of manipulation, and well-characterized genome make it an essential resource for researchers in various fields of microbiology and biotechnology.