This preview shows page 1. Sign up to view the full content.
Unformatted text preview: Capsid: a protein capsid divided into a head that contains the DNA and a tail that plays a role in attaching to the specific host bacterium and injecting the DNA. Bacteriophage lambda specifically infects E. coli . After infection, the linear lambda DNA is converted to a circular, supercoiled form and transcription of lambda genes starts . At this point, decision is made on which life cycle to follow (see Fig. 5.37). What decides? Seems to be the concentration of an activator protein transcribed from lambda DNA this activator is designated cII: high concentration of cII ---- lysogenic cycle favored low concentration of cII ---- lytic cycle favored...
View Full Document
This document was uploaded on 11/03/2011 for the course BIOLOGY MCB2010 at Broward College.
- Fall '10