Currently, the genome of BBKV has only been partially sequenced. It has a spherical nucleocapsid which is approximately 40 nm in diameter and shows icosahedral symmetry of T=4.
Currently, only a portion of the BBKV genome has been fully decoded. It possesses a spherical nucleocapsid measuring about 40 nm in diameter and exhibits an icosahedral symmetry with a topological number T=4.