In this article we will discuss about the meaning of site-specific recombinases of bacteria. During evolution of multiple antibiotic resistance, bacteria seem to have made use of enzymes known as site-specific recombinases. Each type of site-specific recombinase binds with a specific nucleotide sequence in double stranded DNA. When the site is present in each of the two duplex molecules, the [...]
In this article we will discuss about:- 1. Discovery of Transformation 2. Process of Transformation 3. Competence 4. Linkage and Gene Mapping. Discovery of Transformation: The phenomenon was first discovered in 1928 from Griffiths experiment with Diplococcus pneumoniae. As this historical experiment has been instrumental for identification of DNA as a hereditary material. Briefly, when a suspension containing a mixture [...]
The upcoming discussion will update you about the differences between Pili and Fimbriae. Difference # Pili: 1. They occur only in Gram negative bacteria. 2. The number is 1-4 per cell. 3. Pili are longer and broader. 4. They help in conjugation. 5. Formation of pili is controlled by F+ or fertility factor. 6. They are tubular structures. Difference # [...]