Figure 1 Negative contrast electron micrograph of Human papillomavirus 1 (HPV-1) virions (the icosahedral structure includes 360 VP1 subunits arranged in 12 pentavalent and 60 hexavalent capsomers). The bar represents 100 nm.
Figure 2 Diagram of the genome of the Bovine papillomavirus 1 (BPV-1). The viral dsDNA (size in bp, origin of replication: ori), the inner arrows indicate the encoded viral proteins, or ORFs, as well as the direction of transcription.
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