Family: Papillomaviridae

Subfamily: Firstpapillomavirinae

Distinguishing features

The papillomaviruses within the subfamily Firstpapillomavirinae are associated with amniote (reptile, bird, and mammalian) hosts. These viruses contain the core viral proteins (E1, E2, L1, and L2) and at least one additional accessory protein (E5, E6 or E7).