2 bidirectional replication andor by rolling circle

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Unformatted text preview: q 1. 2. Bidirectional replication and/or by Rolling-circle replication Figure 7-23 Plasmid map. Figure 7-24 Plasmid replication: rollingcircle model. Figure 7-25 Molecular model of plasmid segregation. Note the involvement of an actin-like filament, which is mediated by ParM, and the requirement for energy Plasmids are transferred between cells Plasmids play a role in the evolution of bacteria, and in the acquisition of virulence factors (ex. Bacteriocins), antibiotic resistance genes, q Plasmids can be transferred by q Conjugation This process mediated by sex pili q Transformation This process occurs in competent bacteria (bacteria with the ability to uptake DNA). Competence occurs naturally or can be induced chemically or physically q Transduction This process is mediated by bacteriophages q Conjugation Some plasmids (conjugative plasmids) can be transferred by conjugation (contact between 2 cells). Some non transferrable plasmids can be transferred to another cell, if the donor cell has a conjugative plasmid q Transformation Some plasmids that are released by dead bacteria can be up-taken by other bacteria by a process called transformation q Transduction Plasmids can be incorporated into a bacteriophage during packaging, hence they are transferred into the recipient upon infection with the phage. q...
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This note was uploaded on 01/25/2013 for the course MCB 3020 taught by Professor Mydao during the Spring '11 term at University of South Florida - Tampa.

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