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Unformatted text preview: ided with 12 corners • Vary in the number of capsomers • Each capsomer may be made of 1 or several proteins • Some are enveloped 10 complex Fig 6.9a,c
11 6 steps in phage replication 1. adsorption – binding of virus to specific molecule on host cell 2. penetration –genome enters host cell 3. replication – viral components produced 4. assembly viral components assembled 5. maturation – completion of viral formation 6. release – viruses leave cell to infect other cells Video
12 Fig 6.11 13 penetration 14 Bacteriophage assembly line 15 • Not all bacteriophages lyse cells • Temperate phages insert their viral DNA into the host chromosome & viral replication stops at there until some later time. • Lysogeny bacterial chromosome carries phage DNA 16 Host range • Spectrum of cells a virus can infect – cell has to have a specific structure (receptor) on its surface for viral attachment – ce...
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This document was uploaded on 02/25/2014.
- Spring '14