LAST LECTURE ON VIROLOGY

objectives (aLOT)

mainly hepatitis B and ????virus

hepatitis

distinct virus, has many feature that no other virus has

belongs to family

dna virus, enveloped

has some certain antigens (Different variants of surface antigen S)

• 3 types according to size
  • large → L HBsAg (ag → antigen)
  • medium
  • small

genome → DNA, very distinct

• double stranded but in a certain place, single stranded

DNA usually replicates by polymerase enzyme that produces a copy of the dna

but