This family consists of various adenovirus penton base
proteins, from both the mastadenoviridae having mammalian hosts
and the aviadenoviridae having avian hosts. The penton base is a
major structural protein forming part of the penton which consists
of a base and a fiber, the pentons hold a morphologically prominent
position at the vertex capsomer in the adenovirus particle [1].
In mammalian adenovirus there is only one tail on each base where as
in avian adenovirus there are two [1].