21. It has icosahedral symmetry and contains a double-shelled arrangement of surface protein. 22. The capsid possesses T = 1 icosahedral symmetry. 23. It is an enveloped virus with icosahedral nucleocapsid. 24. Cu + Ne 12 has an icosahedral shape. 25. The crenarchaeal virus " Sulfolobus turreted icosahedral virus " has a similar structure. 26. The idea was quickly rationalized as the basis of an icosahedral symmetry closed cage structure. 27. Viruses in this family have small protein virions that exhibit T = 1 icosahedral symmetry. 28. Its capsid appears hexagonal under an electron microscope, therefore the capsid symmetry is icosahedral . 29. This prismatic icosahedral symmetry is [ 5, 3, 2 ], order 240. 30. Arteriviruses are small, enveloped, icosahedral core containing a positive-sense RNA genome.
