BACTERIOPHAGE: BACTERIOPHAGE Dr.Abhijit Gogoi UNIVERSITY OF FIJI
bacteriophage----------------: bacteriophage----------------
PowerPoint Presentation: Bacteriophages ( phages ) are obligate intracellular parasites that multiply inside bacteria by making use of some or all of the host biosynthetic machinery . They are viruses that infect bacteria.
Composition of Bacteriophage : Composition of Bacteriophage Nucleic acid: either DNA or RNA but not both ds DNA, ss RNA, ss DNA unusual or modified bases encode 3-5 gene products to over 100 gene products Protein: function in infection and protect the nucleic acid
Structure of Bacteriophage : Structure of Bacteriophage different sizes and shapes icosahedral 二十面体 filamentous
Types of Bacteriophage: Types of Bacteriophage Lytic or Virulent Phage Lysogenic or Temperate Phage
Lytic or Virulent Phages: Lytic or Virulent Phages Definition: Lytic or virulent phages are phages which can only multiply in bacteria and kill the cell by lysis at the end of the life cycle.
PowerPoint Presentation: Life Cycle Adsorption Penetration Biological Synthesis Maturation and Release
PowerPoint Presentation: Adsorption
PowerPoint Presentation: Penetration
PowerPoint Presentation: Biological Synthesis
PowerPoint Presentation: Maturation and Release
lysogenic conversion : When a cell becomes lysogenized, occasionally extra genes carried by the phage get expressed in the cell. These genes can change the properties of the bacterial cell. This process is called lysogenic conversion. lysogenic conversion
Application of Bacteriophage : Application of Bacteriophage Used in treatment of bacterial infections Used for the identification of pathogenic bacteria (phage typing Used in molecular biology