BIO 3124 Lecture Notes - Lecture 16: Parvovirus, Retrovirus, Cytopathic Effect
Document Summary
Absence of dna and rna together in the same virion. Genomes packaged in a protein capsid: virion anatomy. Capsid: protein shell that encloses the genome, protects the genome from physical/chemical/ Nucleocapsid does not include the envelop enzymatic conditions. Receptor proteins (spikes) enable the recognition and attachment to the host cell. For some viruses, the capsid is surrounded by a lipid bilayer (has enzymes or receptors/ spikes required for attachment and penetration) Genomes: single stranded dna, double stranded dna, single stranded rna, double stranded rna, one or more molecules (segmented), can be circular or linear: classi cation of viruses (groups) Viruses are classi ed in groups according to how they reproduce: double stranded dna, single stranded dna, double stranded rna, positively charged single stranded rna (+ = sense, negatively charged single stranded rna ( = anti-sense, rna reverse transcriptase. Viral species: a group of viruses sharing similar genetic information and ecological niche. Subspecies are designated by a number ie. herpesvirus.