Site pages
Current course
Participants
General
18 February - 24 February
25 February - 3 March
4 March - 10 March
11 March - 17 March
18 March - 24 March
25 March - 31 March
1 April - 7 April
8 April - 14 April
15 April - 21 April
22 April - 28 April
1.5.4 Lysogenic cycle of Bacteriophage
Some phages begin a lysogenic cycle by incorporating their DNA into the host cell’s DNA. During this state, called lysogeny, the phage remains latent. Upon penetration into a bacterial cell, the linear phage DNA becomes a circle. The circular DNA of the phage may recombine with and become part of the circular bacterial DNA. The inserted phage DNA is called a prophage. Every time the host cell replicates the bacterial chromosome, the prophage DNA also gets replicated. The prophage remains latent within the progeny cells. Under some circumstances, or due to the action of UV light or certain chemicals excision of phage DNA occurs which initiates the lytic cycle. |
Last modified: Tuesday, 27 December 2011, 1:25 PM